diff --git a/core/bind/core_bind.cpp b/core/bind/core_bind.cpp
index ce08b3f7541..3e289eeaf33 100644
--- a/core/bind/core_bind.cpp
+++ b/core/bind/core_bind.cpp
@@ -180,8 +180,8 @@ int _OS::get_mouse_button_state() const {
 	return OS::get_singleton()->get_mouse_button_state();
 }
 
-String _OS::get_unique_ID() const {
-	return OS::get_singleton()->get_unique_ID();
+String _OS::get_unique_id() const {
+	return OS::get_singleton()->get_unique_id();
 }
 bool _OS::has_touchscreen_ui_hint() const {
 
@@ -369,9 +369,9 @@ Error _OS::kill(int p_pid) {
 	return OS::get_singleton()->kill(p_pid);
 }
 
-int _OS::get_process_ID() const {
+int _OS::get_process_id() const {
 
-	return OS::get_singleton()->get_process_ID();
+	return OS::get_singleton()->get_process_id();
 };
 
 bool _OS::has_environment(const String &p_var) const {
@@ -800,7 +800,7 @@ void _OS::print_all_textures_by_size() {
 			img.fmt = fmt;
 			img.path = E->get()->get_path();
 			img.vram = Image::get_image_data_size(img.size.width, img.size.height, Image::Format(img.fmt));
-			img.id = E->get()->get_instance_ID();
+			img.id = E->get()->get_instance_id();
 			total += img.vram;
 			imgs.push_back(img);
 		}
@@ -1019,7 +1019,7 @@ void _OS::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("execute", "path", "arguments", "blocking", "output"), &_OS::execute, DEFVAL(Array()));
 	ClassDB::bind_method(D_METHOD("kill", "pid"), &_OS::kill);
 	ClassDB::bind_method(D_METHOD("shell_open", "uri"), &_OS::shell_open);
-	ClassDB::bind_method(D_METHOD("get_process_ID"), &_OS::get_process_ID);
+	ClassDB::bind_method(D_METHOD("get_process_id"), &_OS::get_process_id);
 
 	ClassDB::bind_method(D_METHOD("get_environment", "environment"), &_OS::get_environment);
 	ClassDB::bind_method(D_METHOD("has_environment", "environment"), &_OS::has_environment);
@@ -1074,7 +1074,7 @@ void _OS::_bind_methods() {
 
 	ClassDB::bind_method(D_METHOD("get_data_dir"), &_OS::get_data_dir);
 	ClassDB::bind_method(D_METHOD("get_system_dir", "dir"), &_OS::get_system_dir);
-	ClassDB::bind_method(D_METHOD("get_unique_ID"), &_OS::get_unique_ID);
+	ClassDB::bind_method(D_METHOD("get_unique_id"), &_OS::get_unique_id);
 
 	ClassDB::bind_method(D_METHOD("is_ok_left_and_cancel_right"), &_OS::is_ok_left_and_cancel_right);
 
@@ -2256,7 +2256,7 @@ String _Thread::get_id() const {
 	if (!thread)
 		return String();
 
-	return itos(thread->get_ID());
+	return itos(thread->get_id());
 }
 
 bool _Thread::is_active() const {
diff --git a/core/bind/core_bind.h b/core/bind/core_bind.h
index ec4fd3f476b..e18d663d853 100644
--- a/core/bind/core_bind.h
+++ b/core/bind/core_bind.h
@@ -175,7 +175,7 @@ public:
 	Error kill(int p_pid);
 	Error shell_open(String p_uri);
 
-	int get_process_ID() const;
+	int get_process_id() const;
 
 	bool has_environment(const String &p_var) const;
 	String get_environment(const String &p_var) const;
@@ -204,7 +204,7 @@ public:
 
 	bool is_debug_build() const;
 
-	String get_unique_ID() const;
+	String get_unique_id() const;
 
 	String get_scancode_string(uint32_t p_code) const;
 	bool is_scancode_unicode(uint32_t p_unicode) const;
diff --git a/core/func_ref.cpp b/core/func_ref.cpp
index 1121c6d3e4a..2d74efd8221 100644
--- a/core/func_ref.cpp
+++ b/core/func_ref.cpp
@@ -48,7 +48,7 @@ Variant FuncRef::call_func(const Variant **p_args, int p_argcount, Variant::Call
 void FuncRef::set_instance(Object *p_obj) {
 
 	ERR_FAIL_NULL(p_obj);
-	id = p_obj->get_instance_ID();
+	id = p_obj->get_instance_id();
 }
 void FuncRef::set_function(const StringName &p_func) {
 
diff --git a/core/message_queue.cpp b/core/message_queue.cpp
index 93d0b0730af..564069d8bb4 100644
--- a/core/message_queue.cpp
+++ b/core/message_queue.cpp
@@ -153,16 +153,16 @@ Error MessageQueue::push_notification(ObjectID p_id, int p_notification) {
 
 Error MessageQueue::push_call(Object *p_object, const StringName &p_method, VARIANT_ARG_DECLARE) {
 
-	return push_call(p_object->get_instance_ID(), p_method, VARIANT_ARG_PASS);
+	return push_call(p_object->get_instance_id(), p_method, VARIANT_ARG_PASS);
 }
 
 Error MessageQueue::push_notification(Object *p_object, int p_notification) {
 
-	return push_notification(p_object->get_instance_ID(), p_notification);
+	return push_notification(p_object->get_instance_id(), p_notification);
 }
 Error MessageQueue::push_set(Object *p_object, const StringName &p_prop, const Variant &p_value) {
 
-	return push_set(p_object->get_instance_ID(), p_prop, p_value);
+	return push_set(p_object->get_instance_id(), p_prop, p_value);
 }
 
 void MessageQueue::statistics() {
diff --git a/core/object.cpp b/core/object.cpp
index 5824084151e..de75257ede0 100644
--- a/core/object.cpp
+++ b/core/object.cpp
@@ -599,7 +599,7 @@ Variant Object::_call_deferred_bind(const Variant **p_args, int p_argcount, Vari
 
 	StringName method = *p_args[0];
 
-	MessageQueue::get_singleton()->push_call(get_instance_ID(), method, &p_args[1], p_argcount - 1);
+	MessageQueue::get_singleton()->push_call(get_instance_id(), method, &p_args[1], p_argcount - 1);
 
 	return Variant();
 }
@@ -1247,7 +1247,7 @@ Error Object::emit_signal(const StringName &p_name, const Variant **p_args, int
 		}
 
 		if (c.flags & CONNECT_DEFERRED) {
-			MessageQueue::get_singleton()->push_call(target->get_instance_ID(), c.method, args, argc, true);
+			MessageQueue::get_singleton()->push_call(target->get_instance_id(), c.method, args, argc, true);
 		} else {
 			Variant::CallError ce;
 			target->call(c.method, args, argc, ce);
@@ -1478,7 +1478,7 @@ Error Object::connect(const StringName &p_signal, Object *p_to_object, const Str
 		s = &signal_map[p_signal];
 	}
 
-	Signal::Target target(p_to_object->get_instance_ID(), p_to_method);
+	Signal::Target target(p_to_object->get_instance_id(), p_to_method);
 	if (s->slot_map.has(target)) {
 		ERR_EXPLAIN("Signal '" + p_signal + "'' already connected to given method '" + p_to_method + "' in that object.");
 		ERR_FAIL_COND_V(s->slot_map.has(target), ERR_INVALID_PARAMETER);
@@ -1516,7 +1516,7 @@ bool Object::is_connected(const StringName &p_signal, Object *p_to_object, const
 		ERR_FAIL_COND_V(!s, false);
 	}
 
-	Signal::Target target(p_to_object->get_instance_ID(), p_to_method);
+	Signal::Target target(p_to_object->get_instance_id(), p_to_method);
 
 	return s->slot_map.has(target);
 	//const Map<Signal::Target,Signal::Slot>::Element *E = s->slot_map.find(target);
@@ -1536,7 +1536,7 @@ void Object::disconnect(const StringName &p_signal, Object *p_to_object, const S
 		ERR_FAIL_COND(s->lock > 0);
 	}
 
-	Signal::Target target(p_to_object->get_instance_ID(), p_to_method);
+	Signal::Target target(p_to_object->get_instance_id(), p_to_method);
 
 	if (!s->slot_map.has(target)) {
 		ERR_EXPLAIN("Disconnecting nonexistent signal '" + p_signal + "', slot: " + itos(target._id) + ":" + target.method);
@@ -1667,7 +1667,7 @@ void Object::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_property_list"), &Object::_get_property_list_bind);
 	ClassDB::bind_method(D_METHOD("get_method_list"), &Object::_get_method_list_bind);
 	ClassDB::bind_method(D_METHOD("notification", "what", "reversed"), &Object::notification, DEFVAL(false));
-	ClassDB::bind_method(D_METHOD("get_instance_ID"), &Object::get_instance_ID);
+	ClassDB::bind_method(D_METHOD("get_instance_id"), &Object::get_instance_id);
 
 	ClassDB::bind_method(D_METHOD("set_script", "script:Script"), &Object::set_script);
 	ClassDB::bind_method(D_METHOD("get_script:Script"), &Object::get_script);
@@ -1936,7 +1936,7 @@ ObjectID ObjectDB::instance_counter = 1;
 HashMap<Object *, ObjectID, ObjectDB::ObjectPtrHash> ObjectDB::instance_checks;
 ObjectID ObjectDB::add_instance(Object *p_object) {
 
-	ERR_FAIL_COND_V(p_object->get_instance_ID() != 0, 0);
+	ERR_FAIL_COND_V(p_object->get_instance_id() != 0, 0);
 
 	rw_lock->write_lock();
 	instances[++instance_counter] = p_object;
@@ -1952,7 +1952,7 @@ void ObjectDB::remove_instance(Object *p_object) {
 
 	rw_lock->write_lock();
 
-	instances.erase(p_object->get_instance_ID());
+	instances.erase(p_object->get_instance_id());
 #ifdef DEBUG_ENABLED
 	instance_checks.erase(p_object);
 #endif
diff --git a/core/object.h b/core/object.h
index fd3bb624ec9..f0147080b4d 100644
--- a/core/object.h
+++ b/core/object.h
@@ -534,7 +534,7 @@ public:
 
 	bool _is_gpl_reversed() const { return false; }
 
-	_FORCE_INLINE_ ObjectID get_instance_ID() const { return _instance_ID; }
+	_FORCE_INLINE_ ObjectID get_instance_id() const { return _instance_ID; }
 	// this is used for editors
 
 	void add_change_receptor(Object *p_receptor);
diff --git a/core/os/os.cpp b/core/os/os.cpp
index 8e4c3571959..3a06a3fa8fa 100644
--- a/core/os/os.cpp
+++ b/core/os/os.cpp
@@ -129,7 +129,7 @@ String OS::get_executable_path() const {
 	return _execpath;
 }
 
-int OS::get_process_ID() const {
+int OS::get_process_id() const {
 
 	return -1;
 };
@@ -175,7 +175,7 @@ static void _OS_printres(Object *p_obj) {
 	if (!res)
 		return;
 
-	String str = itos(res->get_instance_ID()) + String(res->get_class()) + ":" + String(res->get_name()) + " - " + res->get_path();
+	String str = itos(res->get_instance_id()) + String(res->get_class()) + ":" + String(res->get_name()) + " - " + res->get_path();
 	if (_OSPRF)
 		_OSPRF->store_line(str);
 	else
@@ -412,7 +412,7 @@ void OS::make_rendering_thread() {
 void OS::swap_buffers() {
 }
 
-String OS::get_unique_ID() const {
+String OS::get_unique_id() const {
 
 	ERR_FAIL_V("");
 }
diff --git a/core/os/os.h b/core/os/os.h
index 703c6a6bcda..8e2257a0e42 100644
--- a/core/os/os.h
+++ b/core/os/os.h
@@ -197,7 +197,7 @@ public:
 	virtual String get_executable_path() const;
 	virtual Error execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id = NULL, String *r_pipe = NULL, int *r_exitcode = NULL) = 0;
 	virtual Error kill(const ProcessID &p_pid) = 0;
-	virtual int get_process_ID() const;
+	virtual int get_process_id() const;
 
 	virtual Error shell_open(String p_uri);
 	virtual Error set_cwd(const String &p_cwd);
@@ -370,7 +370,7 @@ public:
 
 	virtual int get_processor_count() const;
 
-	virtual String get_unique_ID() const;
+	virtual String get_unique_id() const;
 
 	virtual Error native_video_play(String p_path, float p_volume, String p_audio_track, String p_subtitle_track);
 	virtual bool native_video_is_playing() const;
diff --git a/core/os/thread.cpp b/core/os/thread.cpp
index 98f19686291..bd565334c3a 100644
--- a/core/os/thread.cpp
+++ b/core/os/thread.cpp
@@ -30,16 +30,16 @@
 #include "thread.h"
 
 Thread *(*Thread::create_func)(ThreadCreateCallback, void *, const Settings &) = NULL;
-Thread::ID (*Thread::get_thread_ID_func)() = NULL;
+Thread::ID (*Thread::get_thread_id_func)() = NULL;
 void (*Thread::wait_to_finish_func)(Thread *) = NULL;
 Error (*Thread::set_name_func)(const String &) = NULL;
 
 Thread::ID Thread::_main_thread_id = 0;
 
-Thread::ID Thread::get_caller_ID() {
+Thread::ID Thread::get_caller_id() {
 
-	if (get_thread_ID_func)
-		return get_thread_ID_func();
+	if (get_thread_id_func)
+		return get_thread_id_func();
 	return 0;
 }
 
diff --git a/core/os/thread.h b/core/os/thread.h
index 3ad5d4bf2c6..1103f67ff26 100644
--- a/core/os/thread.h
+++ b/core/os/thread.h
@@ -58,7 +58,7 @@ public:
 
 protected:
 	static Thread *(*create_func)(ThreadCreateCallback p_callback, void *, const Settings &);
-	static ID (*get_thread_ID_func)();
+	static ID (*get_thread_id_func)();
 	static void (*wait_to_finish_func)(Thread *);
 	static Error (*set_name_func)(const String &);
 
@@ -69,11 +69,11 @@ protected:
 	Thread();
 
 public:
-	virtual ID get_ID() const = 0;
+	virtual ID get_id() const = 0;
 
 	static Error set_name(const String &p_name);
-	_FORCE_INLINE_ static ID get_main_ID() { return _main_thread_id; } ///< get the ID of the main thread
-	static ID get_caller_ID(); ///< get the ID of the caller function ID
+	_FORCE_INLINE_ static ID get_main_id() { return _main_thread_id; } ///< get the ID of the main thread
+	static ID get_caller_id(); ///< get the ID of the caller function ID
 	static void wait_to_finish(Thread *p_thread); ///< waits until thread is finished, and deallocates it.
 	static Thread *create(ThreadCreateCallback p_callback, void *p_user, const Settings &p_settings = Settings()); ///< Static function to create a thread, will call p_callback
 
diff --git a/core/os/thread_dummy.h b/core/os/thread_dummy.h
index 4155103bbf5..64941a71f82 100644
--- a/core/os/thread_dummy.h
+++ b/core/os/thread_dummy.h
@@ -39,7 +39,7 @@ class ThreadDummy : public Thread {
 	static Thread *create(ThreadCreateCallback p_callback, void *p_user, const Settings &p_settings = Settings());
 
 public:
-	virtual ID get_ID() const { return 0; };
+	virtual ID get_id() const { return 0; };
 
 	static void make_default();
 };
diff --git a/core/reference.cpp b/core/reference.cpp
index 060608eacb2..066dc8059eb 100644
--- a/core/reference.cpp
+++ b/core/reference.cpp
@@ -108,12 +108,12 @@ Variant WeakRef::get_ref() const {
 }
 
 void WeakRef::set_obj(Object *p_object) {
-	ref = p_object ? p_object->get_instance_ID() : 0;
+	ref = p_object ? p_object->get_instance_id() : 0;
 }
 
 void WeakRef::set_ref(const REF &p_ref) {
 
-	ref = p_ref.is_valid() ? p_ref->get_instance_ID() : 0;
+	ref = p_ref.is_valid() ? p_ref->get_instance_id() : 0;
 }
 
 WeakRef::WeakRef() {
diff --git a/core/resource.cpp b/core/resource.cpp
index 86069bf2e90..9bce343cbab 100644
--- a/core/resource.cpp
+++ b/core/resource.cpp
@@ -228,12 +228,12 @@ RID Resource::get_rid() const {
 
 void Resource::register_owner(Object *p_owner) {
 
-	owners.insert(p_owner->get_instance_ID());
+	owners.insert(p_owner->get_instance_id());
 }
 
 void Resource::unregister_owner(Object *p_owner) {
 
-	owners.erase(p_owner->get_instance_ID());
+	owners.erase(p_owner->get_instance_id());
 }
 
 void Resource::notify_change_to_owners() {
diff --git a/core/script_debugger_remote.cpp b/core/script_debugger_remote.cpp
index d19fe213f6b..fdde08bb32a 100644
--- a/core/script_debugger_remote.cpp
+++ b/core/script_debugger_remote.cpp
@@ -95,7 +95,7 @@ static Object *_ScriptDebuggerRemote_find = NULL;
 static void _ScriptDebuggerRemote_debug_func(Object *p_obj) {
 
 	if (_ScriptDebuggerRemote_find == p_obj) {
-		_ScriptDebuggerRemote_found_id = p_obj->get_instance_ID();
+		_ScriptDebuggerRemote_found_id = p_obj->get_instance_id();
 	}
 }
 
@@ -109,7 +109,7 @@ static ObjectID safe_get_instance_id(const Variant &p_v) {
 		REF r = p_v;
 		if (r.is_valid()) {
 
-			return r->get_instance_ID();
+			return r->get_instance_id();
 		} else {
 
 			_ScriptDebuggerRemote_found_id = 0;
@@ -572,7 +572,7 @@ void ScriptDebuggerRemote::_send_object_id(ObjectID p_id) {
 				ObjectID id2;
 				Object *obj = var;
 				if (obj) {
-					id2 = obj->get_instance_ID();
+					id2 = obj->get_instance_id();
 				} else {
 					id2 = 0;
 				}
diff --git a/core/undo_redo.cpp b/core/undo_redo.cpp
index b3ac9d274ef..637fcd91d45 100644
--- a/core/undo_redo.cpp
+++ b/core/undo_redo.cpp
@@ -110,7 +110,7 @@ void UndoRedo::add_do_method(Object *p_object, const String &p_method, VARIANT_A
 	ERR_FAIL_COND(action_level <= 0);
 	ERR_FAIL_COND((current_action + 1) >= actions.size());
 	Operation do_op;
-	do_op.object = p_object->get_instance_ID();
+	do_op.object = p_object->get_instance_id();
 	if (p_object->cast_to<Resource>())
 		do_op.resref = Ref<Resource>(p_object->cast_to<Resource>());
 
@@ -134,7 +134,7 @@ void UndoRedo::add_undo_method(Object *p_object, const String &p_method, VARIANT
 		return;
 
 	Operation undo_op;
-	undo_op.object = p_object->get_instance_ID();
+	undo_op.object = p_object->get_instance_id();
 	if (p_object->cast_to<Resource>())
 		undo_op.resref = Ref<Resource>(p_object->cast_to<Resource>());
 
@@ -151,7 +151,7 @@ void UndoRedo::add_do_property(Object *p_object, const String &p_property, const
 	ERR_FAIL_COND(action_level <= 0);
 	ERR_FAIL_COND((current_action + 1) >= actions.size());
 	Operation do_op;
-	do_op.object = p_object->get_instance_ID();
+	do_op.object = p_object->get_instance_id();
 	if (p_object->cast_to<Resource>())
 		do_op.resref = Ref<Resource>(p_object->cast_to<Resource>());
 
@@ -170,7 +170,7 @@ void UndoRedo::add_undo_property(Object *p_object, const String &p_property, con
 		return;
 
 	Operation undo_op;
-	undo_op.object = p_object->get_instance_ID();
+	undo_op.object = p_object->get_instance_id();
 	if (p_object->cast_to<Resource>())
 		undo_op.resref = Ref<Resource>(p_object->cast_to<Resource>());
 
@@ -184,7 +184,7 @@ void UndoRedo::add_do_reference(Object *p_object) {
 	ERR_FAIL_COND(action_level <= 0);
 	ERR_FAIL_COND((current_action + 1) >= actions.size());
 	Operation do_op;
-	do_op.object = p_object->get_instance_ID();
+	do_op.object = p_object->get_instance_id();
 	if (p_object->cast_to<Resource>())
 		do_op.resref = Ref<Resource>(p_object->cast_to<Resource>());
 
@@ -201,7 +201,7 @@ void UndoRedo::add_undo_reference(Object *p_object) {
 		return;
 
 	Operation undo_op;
-	undo_op.object = p_object->get_instance_ID();
+	undo_op.object = p_object->get_instance_id();
 	if (p_object->cast_to<Resource>())
 		undo_op.resref = Ref<Resource>(p_object->cast_to<Resource>());
 
diff --git a/core/variant.cpp b/core/variant.cpp
index 0807a337882..51c4b70bdc7 100644
--- a/core/variant.cpp
+++ b/core/variant.cpp
@@ -1600,7 +1600,7 @@ Variant::operator String() const {
 					};
 				};
 #endif
-				return "[" + _get_obj().obj->get_class() + ":" + itos(_get_obj().obj->get_instance_ID()) + "]";
+				return "[" + _get_obj().obj->get_class() + ":" + itos(_get_obj().obj->get_instance_id()) + "]";
 			} else
 				return "[Object:null]";
 
diff --git a/doc/base/classes.xml b/doc/base/classes.xml
index cd5b950f57e..7dd22d7cb06 100644
--- a/doc/base/classes.xml
+++ b/doc/base/classes.xml
@@ -27432,7 +27432,7 @@
 			<description>
 			</description>
 		</method>
-		<method name="get_process_ID" qualifiers="const">
+		<method name="get_process_id" qualifiers="const">
 			<return type="int">
 			</return>
 			<description>
@@ -27558,7 +27558,7 @@
 			<description>
 			</description>
 		</method>
-		<method name="get_unique_ID" qualifiers="const">
+		<method name="get_unique_id" qualifiers="const">
 			<return type="String">
 			</return>
 			<description>
@@ -28150,7 +28150,7 @@
 				- "method_name" is a name of method to which signal is connected.
 			</description>
 		</method>
-		<method name="get_instance_ID" qualifiers="const">
+		<method name="get_instance_id" qualifiers="const">
 			<return type="int">
 			</return>
 			<description>
@@ -28498,7 +28498,7 @@
 				Clear all the items in the [OptionButton].
 			</description>
 		</method>
-		<method name="get_item_ID" qualifiers="const">
+		<method name="get_item_id" qualifiers="const">
 			<return type="int">
 			</return>
 			<argument index="0" name="idx" type="int">
@@ -28547,7 +28547,7 @@
 				Return the current item index
 			</description>
 		</method>
-		<method name="get_selected_ID" qualifiers="const">
+		<method name="get_selected_id" qualifiers="const">
 			<return type="int">
 			</return>
 			<description>
@@ -28580,7 +28580,7 @@
 				Select an item by index and make it the current item.
 			</description>
 		</method>
-		<method name="set_item_ID">
+		<method name="set_item_id">
 			<argument index="0" name="idx" type="int">
 			</argument>
 			<argument index="1" name="id" type="int">
@@ -30915,7 +30915,7 @@
 				Add a shape to the area, along with a transform matrix. Shapes are usually referenced by their index, so you should track which shape has a given index.
 			</description>
 		</method>
-		<method name="area_attach_object_instance_ID">
+		<method name="area_attach_object_instance_id">
 			<argument index="0" name="area" type="RID">
 			</argument>
 			<argument index="1" name="id" type="int">
@@ -30938,7 +30938,7 @@
 				Create an [Area2D].
 			</description>
 		</method>
-		<method name="area_get_object_instance_ID" qualifiers="const">
+		<method name="area_get_object_instance_id" qualifiers="const">
 			<return type="int">
 			</return>
 			<argument index="0" name="area" type="RID">
@@ -31169,7 +31169,7 @@
 				Add a positioned impulse to the applied force and torque. Both the force and the offset from the body origin are in global coordinates.
 			</description>
 		</method>
-		<method name="body_attach_object_instance_ID">
+		<method name="body_attach_object_instance_id">
 			<argument index="0" name="body" type="RID">
 			</argument>
 			<argument index="1" name="id" type="int">
@@ -31241,7 +31241,7 @@
 				Return the body mode.
 			</description>
 		</method>
-		<method name="body_get_object_instance_ID" qualifiers="const">
+		<method name="body_get_object_instance_id" qualifiers="const">
 			<return type="int">
 			</return>
 			<argument index="0" name="body" type="RID">
@@ -32659,7 +32659,7 @@
 			<description>
 			</description>
 		</method>
-		<method name="area_attach_object_instance_ID">
+		<method name="area_attach_object_instance_id">
 			<argument index="0" name="area" type="RID">
 			</argument>
 			<argument index="1" name="id" type="int">
@@ -32679,7 +32679,7 @@
 			<description>
 			</description>
 		</method>
-		<method name="area_get_object_instance_ID" qualifiers="const">
+		<method name="area_get_object_instance_id" qualifiers="const">
 			<return type="int">
 			</return>
 			<argument index="0" name="area" type="RID">
@@ -32887,7 +32887,7 @@
 			<description>
 			</description>
 		</method>
-		<method name="body_attach_object_instance_ID">
+		<method name="body_attach_object_instance_id">
 			<argument index="0" name="body" type="RID">
 			</argument>
 			<argument index="1" name="id" type="int">
@@ -32951,7 +32951,7 @@
 			<description>
 			</description>
 		</method>
-		<method name="body_get_object_instance_ID" qualifiers="const">
+		<method name="body_get_object_instance_id" qualifiers="const">
 			<return type="int">
 			</return>
 			<argument index="0" name="body" type="RID">
@@ -33401,7 +33401,7 @@
 			<description>
 			</description>
 		</method>
-		<method name="pin_joint_get_local_A" qualifiers="const">
+		<method name="pin_joint_get_local_a" qualifiers="const">
 			<return type="Vector3">
 			</return>
 			<argument index="0" name="joint" type="RID">
@@ -33409,7 +33409,7 @@
 			<description>
 			</description>
 		</method>
-		<method name="pin_joint_get_local_B" qualifiers="const">
+		<method name="pin_joint_get_local_b" qualifiers="const">
 			<return type="Vector3">
 			</return>
 			<argument index="0" name="joint" type="RID">
@@ -33427,7 +33427,7 @@
 			<description>
 			</description>
 		</method>
-		<method name="pin_joint_set_local_A">
+		<method name="pin_joint_set_local_a">
 			<argument index="0" name="joint" type="RID">
 			</argument>
 			<argument index="1" name="local_A" type="Vector3">
@@ -33435,7 +33435,7 @@
 			<description>
 			</description>
 		</method>
-		<method name="pin_joint_set_local_B">
+		<method name="pin_joint_set_local_b">
 			<argument index="0" name="joint" type="RID">
 			</argument>
 			<argument index="1" name="local_B" type="Vector3">
@@ -35378,7 +35378,7 @@
 				Clear the popup menu, in effect removing all items.
 			</description>
 		</method>
-		<method name="get_item_ID" qualifiers="const">
+		<method name="get_item_id" qualifiers="const">
 			<return type="int">
 			</return>
 			<argument index="0" name="idx" type="int">
@@ -35535,7 +35535,7 @@
 				Sets whether or not the PopupMenu will hide on item selection.
 			</description>
 		</method>
-		<method name="set_item_ID">
+		<method name="set_item_id">
 			<argument index="0" name="idx" type="int">
 			</argument>
 			<argument index="1" name="id" type="int">
diff --git a/drivers/unix/os_unix.cpp b/drivers/unix/os_unix.cpp
index e424590881b..0f4e8f757c3 100644
--- a/drivers/unix/os_unix.cpp
+++ b/drivers/unix/os_unix.cpp
@@ -415,7 +415,7 @@ Error OS_Unix::kill(const ProcessID &p_pid) {
 	return ret ? ERR_INVALID_PARAMETER : OK;
 }
 
-int OS_Unix::get_process_ID() const {
+int OS_Unix::get_process_id() const {
 
 	return getpid();
 };
diff --git a/drivers/unix/os_unix.h b/drivers/unix/os_unix.h
index fdc6d6e28f0..6cd0016bb03 100644
--- a/drivers/unix/os_unix.h
+++ b/drivers/unix/os_unix.h
@@ -103,7 +103,7 @@ public:
 
 	virtual Error execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id = NULL, String *r_pipe = NULL, int *r_exitcode = NULL);
 	virtual Error kill(const ProcessID &p_pid);
-	virtual int get_process_ID() const;
+	virtual int get_process_id() const;
 
 	virtual bool has_environment(const String &p_var) const;
 	virtual String get_environment(const String &p_var) const;
diff --git a/drivers/unix/thread_posix.cpp b/drivers/unix/thread_posix.cpp
index c1559619d77..3b895ff9c15 100644
--- a/drivers/unix/thread_posix.cpp
+++ b/drivers/unix/thread_posix.cpp
@@ -38,7 +38,7 @@
 
 #include "os/memory.h"
 
-Thread::ID ThreadPosix::get_ID() const {
+Thread::ID ThreadPosix::get_id() const {
 
 	return id;
 }
@@ -75,7 +75,7 @@ Thread *ThreadPosix::create_func_posix(ThreadCreateCallback p_callback, void *p_
 
 	return tr;
 }
-Thread::ID ThreadPosix::get_thread_ID_func_posix() {
+Thread::ID ThreadPosix::get_thread_id_func_posix() {
 
 	return (ID)pthread_self();
 }
@@ -122,7 +122,7 @@ Error ThreadPosix::set_name_func_posix(const String &p_name) {
 void ThreadPosix::make_default() {
 
 	create_func = create_func_posix;
-	get_thread_ID_func = get_thread_ID_func_posix;
+	get_thread_id_func = get_thread_id_func_posix;
 	wait_to_finish_func = wait_to_finish_func_posix;
 	set_name_func = set_name_func_posix;
 }
diff --git a/drivers/unix/thread_posix.h b/drivers/unix/thread_posix.h
index c0c3e578bba..21e1d290a94 100644
--- a/drivers/unix/thread_posix.h
+++ b/drivers/unix/thread_posix.h
@@ -53,7 +53,7 @@ class ThreadPosix : public Thread {
 	static void *thread_callback(void *userdata);
 
 	static Thread *create_func_posix(ThreadCreateCallback p_callback, void *, const Settings &);
-	static ID get_thread_ID_func_posix();
+	static ID get_thread_id_func_posix();
 	static void wait_to_finish_func_posix(Thread *p_thread);
 
 	static Error set_name_func_posix(const String &p_name);
@@ -61,7 +61,7 @@ class ThreadPosix : public Thread {
 	ThreadPosix();
 
 public:
-	virtual ID get_ID() const;
+	virtual ID get_id() const;
 
 	static void make_default();
 
diff --git a/drivers/windows/thread_windows.cpp b/drivers/windows/thread_windows.cpp
index 79077a54c86..01ddf42649a 100644
--- a/drivers/windows/thread_windows.cpp
+++ b/drivers/windows/thread_windows.cpp
@@ -33,7 +33,7 @@
 
 #include "os/memory.h"
 
-Thread::ID ThreadWindows::get_ID() const {
+Thread::ID ThreadWindows::get_id() const {
 
 	return id;
 }
@@ -72,7 +72,7 @@ Thread *ThreadWindows::create_func_windows(ThreadCreateCallback p_callback, void
 
 	return tr;
 }
-Thread::ID ThreadWindows::get_thread_ID_func_windows() {
+Thread::ID ThreadWindows::get_thread_id_func_windows() {
 
 	return (ID)GetCurrentThreadId(); //must implement
 }
@@ -88,7 +88,7 @@ void ThreadWindows::wait_to_finish_func_windows(Thread *p_thread) {
 void ThreadWindows::make_default() {
 
 	create_func = create_func_windows;
-	get_thread_ID_func = get_thread_ID_func_windows;
+	get_thread_id_func = get_thread_id_func_windows;
 	wait_to_finish_func = wait_to_finish_func_windows;
 }
 
diff --git a/drivers/windows/thread_windows.h b/drivers/windows/thread_windows.h
index 162df089752..143825039c1 100644
--- a/drivers/windows/thread_windows.h
+++ b/drivers/windows/thread_windows.h
@@ -52,13 +52,13 @@ class ThreadWindows : public Thread {
 	static DWORD WINAPI thread_callback(LPVOID userdata);
 
 	static Thread *create_func_windows(ThreadCreateCallback p_callback, void *, const Settings &);
-	static ID get_thread_ID_func_windows();
+	static ID get_thread_id_func_windows();
 	static void wait_to_finish_func_windows(Thread *p_thread);
 
 	ThreadWindows();
 
 public:
-	virtual ID get_ID() const;
+	virtual ID get_id() const;
 
 	static void make_default();
 
diff --git a/editor/array_property_edit.cpp b/editor/array_property_edit.cpp
index 81d53097123..06d7d5fdc80 100644
--- a/editor/array_property_edit.cpp
+++ b/editor/array_property_edit.cpp
@@ -251,7 +251,7 @@ void ArrayPropertyEdit::edit(Object *p_obj, const StringName &p_prop, const Stri
 
 	page = 0;
 	property = p_prop;
-	obj = p_obj->get_instance_ID();
+	obj = p_obj->get_instance_id();
 	default_type = p_deftype;
 
 	if (!p_hint_string.empty()) {
diff --git a/editor/asset_library_editor_plugin.cpp b/editor/asset_library_editor_plugin.cpp
index f92b70d0c09..2a22cde2fb9 100644
--- a/editor/asset_library_editor_plugin.cpp
+++ b/editor/asset_library_editor_plugin.cpp
@@ -1136,7 +1136,7 @@ void EditorAssetLibrary::_http_request_completed(int p_status, int p_code, const
 				item->connect("category_selected", this, "_select_category");
 
 				if (r.has("icon_url") && r["icon_url"] != "") {
-					_request_image(item->get_instance_ID(), r["icon_url"], IMAGE_QUEUE_ICON, 0);
+					_request_image(item->get_instance_id(), r["icon_url"], IMAGE_QUEUE_ICON, 0);
 				}
 			}
 		} break;
@@ -1173,7 +1173,7 @@ void EditorAssetLibrary::_http_request_completed(int p_status, int p_code, const
 			item->connect("category_selected",this,"_category_selected");*/
 
 			if (r.has("icon_url") && r["icon_url"] != "") {
-				_request_image(description->get_instance_ID(), r["icon_url"], IMAGE_QUEUE_ICON, 0);
+				_request_image(description->get_instance_id(), r["icon_url"], IMAGE_QUEUE_ICON, 0);
 			}
 
 			if (d.has("previews")) {
@@ -1195,12 +1195,12 @@ void EditorAssetLibrary::_http_request_completed(int p_status, int p_code, const
 					description->add_preview(i, is_video, video_url);
 
 					if (p.has("thumbnail")) {
-						_request_image(description->get_instance_ID(), p["thumbnail"], IMAGE_QUEUE_THUMBNAIL, i);
+						_request_image(description->get_instance_id(), p["thumbnail"], IMAGE_QUEUE_THUMBNAIL, i);
 					}
 					if (is_video) {
-						//_request_image(description->get_instance_ID(),p["link"],IMAGE_QUEUE_SCREENSHOT,i);
+						//_request_image(description->get_instance_id(),p["link"],IMAGE_QUEUE_SCREENSHOT,i);
 					} else {
-						_request_image(description->get_instance_ID(), p["link"], IMAGE_QUEUE_SCREENSHOT, i);
+						_request_image(description->get_instance_id(), p["link"], IMAGE_QUEUE_SCREENSHOT, i);
 					}
 				}
 			}
diff --git a/editor/connections_dialog.cpp b/editor/connections_dialog.cpp
index 9762bd20004..47c2cb5536e 100644
--- a/editor/connections_dialog.cpp
+++ b/editor/connections_dialog.cpp
@@ -220,7 +220,7 @@ void ConnectDialog::_add_bind() {
 
 	if (cdbinds->params.size() >= VARIANT_ARG_MAX)
 		return;
-	Variant::Type vt = (Variant::Type)type_list->get_item_ID(type_list->get_selected());
+	Variant::Type vt = (Variant::Type)type_list->get_item_id(type_list->get_selected());
 
 	Variant value;
 
diff --git a/editor/editor_data.cpp b/editor/editor_data.cpp
index c82e8f1226e..c3c3f0d3cad 100644
--- a/editor/editor_data.cpp
+++ b/editor/editor_data.cpp
@@ -183,7 +183,7 @@ ObjectID EditorHistory::get_current() {
 	if (!obj)
 		return 0;
 
-	return obj->get_instance_ID();
+	return obj->get_instance_id();
 }
 
 int EditorHistory::get_path_size() const {
@@ -208,7 +208,7 @@ ObjectID EditorHistory::get_path_object(int p_index) const {
 	if (!obj)
 		return 0;
 
-	return obj->get_instance_ID();
+	return obj->get_instance_id();
 }
 
 String EditorHistory::get_path_property(int p_index) const {
diff --git a/editor/editor_log.cpp b/editor/editor_log.cpp
index 5d13c7c2544..addffd6ea33 100644
--- a/editor/editor_log.cpp
+++ b/editor/editor_log.cpp
@@ -36,7 +36,7 @@
 void EditorLog::_error_handler(void *p_self, const char *p_func, const char *p_file, int p_line, const char *p_error, const char *p_errorexp, ErrorHandlerType p_type) {
 
 	EditorLog *self = (EditorLog *)p_self;
-	if (self->current != Thread::get_caller_ID())
+	if (self->current != Thread::get_caller_id())
 		return;
 
 	String err_str;
@@ -204,7 +204,7 @@ EditorLog::EditorLog() {
 	eh.userdata = this;
 	add_error_handler(&eh);
 
-	current = Thread::get_caller_ID();
+	current = Thread::get_caller_id();
 
 	EditorNode::get_undo_redo()->set_commit_notify_callback(_undo_redo_cbk, this);
 }
diff --git a/editor/editor_node.cpp b/editor/editor_node.cpp
index 4d5dd141723..730ba3cacc7 100644
--- a/editor/editor_node.cpp
+++ b/editor/editor_node.cpp
@@ -1358,7 +1358,7 @@ void EditorNode::push_item(Object *p_object, const String &p_property) {
 		return;
 	}
 
-	uint32_t id = p_object->get_instance_ID();
+	uint32_t id = p_object->get_instance_id();
 	if (id != editor_history.get_current()) {
 
 		if (p_property == "")
diff --git a/editor/editor_path.cpp b/editor/editor_path.cpp
index 8ce4f88590b..fdac68ea1fd 100644
--- a/editor/editor_path.cpp
+++ b/editor/editor_path.cpp
@@ -63,7 +63,7 @@ void EditorPath::_add_children_to_popup(Object *p_obj, int p_depth) {
 		int index = popup->get_item_count();
 		popup->add_icon_item(icon, E->get().name.capitalize(), objects.size());
 		popup->set_item_h_offset(index, p_depth * 10 * EDSCALE);
-		objects.push_back(obj->get_instance_ID());
+		objects.push_back(obj->get_instance_id());
 
 		_add_children_to_popup(obj, p_depth + 1);
 	}
diff --git a/editor/editor_resource_preview.cpp b/editor/editor_resource_preview.cpp
index 89fa004eb14..3d761d72894 100644
--- a/editor/editor_resource_preview.cpp
+++ b/editor/editor_resource_preview.cpp
@@ -295,7 +295,7 @@ void EditorResourcePreview::queue_edited_resource_preview(const Ref<Resource> &p
 
 	preview_mutex->lock();
 
-	String path_id = "ID:" + itos(p_res->get_instance_ID());
+	String path_id = "ID:" + itos(p_res->get_instance_id());
 
 	if (cache.has(path_id) && cache[path_id].last_hash == p_res->hash_edited_version()) {
 
@@ -310,7 +310,7 @@ void EditorResourcePreview::queue_edited_resource_preview(const Ref<Resource> &p
 	//print_line("send to thread "+p_path);
 	QueueItem item;
 	item.function = p_receiver_func;
-	item.id = p_receiver->get_instance_ID();
+	item.id = p_receiver->get_instance_id();
 	item.resource = p_res;
 	item.path = path_id;
 	item.userdata = p_userdata;
@@ -334,7 +334,7 @@ void EditorResourcePreview::queue_resource_preview(const String &p_path, Object
 	//print_line("send to thread "+p_path);
 	QueueItem item;
 	item.function = p_receiver_func;
-	item.id = p_receiver->get_instance_ID();
+	item.id = p_receiver->get_instance_id();
 	item.path = p_path;
 	item.userdata = p_userdata;
 
diff --git a/editor/editor_run.cpp b/editor/editor_run.cpp
index aa97dd237be..4954b1f7417 100644
--- a/editor/editor_run.cpp
+++ b/editor/editor_run.cpp
@@ -55,7 +55,7 @@ Error EditorRun::run(const String &p_scene, const String p_custom_args, const Li
 	}
 
 	args.push_back("-epid");
-	args.push_back(String::num(OS::get_singleton()->get_process_ID()));
+	args.push_back(String::num(OS::get_singleton()->get_process_id()));
 
 	if (debug_collisions) {
 		args.push_back("-debugcol");
diff --git a/editor/plugins/canvas_item_editor_plugin.cpp b/editor/plugins/canvas_item_editor_plugin.cpp
index a809a68c235..f5d9da195a3 100644
--- a/editor/plugins/canvas_item_editor_plugin.cpp
+++ b/editor/plugins/canvas_item_editor_plugin.cpp
@@ -385,7 +385,7 @@ void CanvasItemEditor::_add_canvas_item(CanvasItem *p_canvas_item) {
 		return;
 
 	canvas_items.insert(p_canvas_item,p_info);
-	p_canvas_item->connect("hide",this,"_visibility_changed",varray(p_canvas_item->get_instance_ID()),CONNECT_ONESHOT);
+	p_canvas_item->connect("hide",this,"_visibility_changed",varray(p_canvas_item->get_instance_id()),CONNECT_ONESHOT);
 #endif
 }
 
@@ -2204,7 +2204,7 @@ void CanvasItemEditor::_find_canvas_items_span(Node *p_node, Rect2 &r_rect, cons
 
 		if (c->has_meta("_edit_bone_")) {
 
-			ObjectID id = c->get_instance_ID();
+			ObjectID id = c->get_instance_id();
 			if (!bone_list.has(id)) {
 				BoneList bone;
 				bone.bone = id;
@@ -2769,7 +2769,7 @@ void CanvasItemEditor::_popup_callback(int p_op) {
 					pc.pos = n2d->get_position();
 					pc.rot = n2d->get_rotation();
 					pc.scale = n2d->get_scale();
-					pc.id = n2d->get_instance_ID();
+					pc.id = n2d->get_instance_id();
 					pose_clipboard.push_back(pc);
 				}
 			}
diff --git a/editor/plugins/item_list_editor_plugin.h b/editor/plugins/item_list_editor_plugin.h
index 4fed8e49f58..bc009b3d7a8 100644
--- a/editor/plugins/item_list_editor_plugin.h
+++ b/editor/plugins/item_list_editor_plugin.h
@@ -116,8 +116,8 @@ public:
 	virtual void set_item_enabled(int p_idx, int p_enabled) { ob->set_item_disabled(p_idx, !p_enabled); }
 	virtual bool is_item_enabled(int p_idx) const { return !ob->is_item_disabled(p_idx); }
 
-	virtual void set_item_id(int p_idx, int p_id) { ob->set_item_ID(p_idx, p_id); }
-	virtual int get_item_id(int p_idx) const { return ob->get_item_ID(p_idx); }
+	virtual void set_item_id(int p_idx, int p_id) { ob->set_item_id(p_idx, p_id); }
+	virtual int get_item_id(int p_idx) const { return ob->get_item_id(p_idx); }
 
 	virtual void add_item();
 	virtual int get_item_count() const;
@@ -152,8 +152,8 @@ public:
 	virtual void set_item_enabled(int p_idx, int p_enabled) { pp->set_item_disabled(p_idx, !p_enabled); }
 	virtual bool is_item_enabled(int p_idx) const { return !pp->is_item_disabled(p_idx); }
 
-	virtual void set_item_id(int p_idx, int p_id) { pp->set_item_ID(p_idx, p_idx); }
-	virtual int get_item_id(int p_idx) const { return pp->get_item_ID(p_idx); }
+	virtual void set_item_id(int p_idx, int p_id) { pp->set_item_id(p_idx, p_idx); }
+	virtual int get_item_id(int p_idx) const { return pp->get_item_id(p_idx); }
 
 	virtual void set_item_separator(int p_idx, bool p_separator) { pp->set_item_as_separator(p_idx, p_separator); }
 	virtual bool is_item_separator(int p_idx) const { return pp->is_item_separator(p_idx); }
diff --git a/editor/plugins/script_text_editor.cpp b/editor/plugins/script_text_editor.cpp
index e3184a028e7..62fcc4b4895 100644
--- a/editor/plugins/script_text_editor.cpp
+++ b/editor/plugins/script_text_editor.cpp
@@ -456,7 +456,7 @@ String ScriptTextEditor::get_name() {
 	} else if (script->get_name() != "")
 		name = script->get_name();
 	else
-		name = script->get_class() + "(" + itos(script->get_instance_ID()) + ")";
+		name = script->get_class() + "(" + itos(script->get_instance_id()) + ")";
 
 	return name;
 }
diff --git a/editor/plugins/spatial_editor_plugin.cpp b/editor/plugins/spatial_editor_plugin.cpp
index 2d77bfb2c1d..0bdcb839920 100644
--- a/editor/plugins/spatial_editor_plugin.cpp
+++ b/editor/plugins/spatial_editor_plugin.cpp
@@ -665,7 +665,7 @@ void SpatialEditorViewport::_list_select(Ref<InputEventMouseButton> b) {
 
 	if (selection_results.size() == 1) {
 
-		clicked = selection_results[0].item->get_instance_ID();
+		clicked = selection_results[0].item->get_instance_id();
 		selection_results.clear();
 
 		if (clicked) {
@@ -2166,7 +2166,7 @@ void SpatialEditorViewport::_selection_result_pressed(int p_result) {
 	if (selection_results.size() <= p_result)
 		return;
 
-	clicked = selection_results[p_result].item->get_instance_ID();
+	clicked = selection_results[p_result].item->get_instance_id();
 
 	if (clicked) {
 		_select_clicked(clicked_wants_append, true);
@@ -3039,9 +3039,9 @@ void SpatialEditor::edit(Spatial *p_spatial) {
 	/*
 	if (p_spatial) {
 		_validate_selection();
-		if (selected.has(p_spatial->get_instance_ID()) && selected.size()==1)
+		if (selected.has(p_spatial->get_instance_id()) && selected.size()==1)
 			return;
-		_select(p_spatial->get_instance_ID(),false,true);
+		_select(p_spatial->get_instance_id(),false,true);
 
 		// should become the selection
 	}
diff --git a/editor/plugins/theme_editor_plugin.cpp b/editor/plugins/theme_editor_plugin.cpp
index f5bb9d4a357..d45a3b1312d 100644
--- a/editor/plugins/theme_editor_plugin.cpp
+++ b/editor/plugins/theme_editor_plugin.cpp
@@ -104,7 +104,7 @@ struct _TECategory {
 
 		Ref<T> item;
 		StringName name;
-		bool operator<(const RefItem<T> &p) const { return item->get_instance_ID() < p.item->get_instance_ID(); }
+		bool operator<(const RefItem<T> &p) const { return item->get_instance_id() < p.item->get_instance_id(); }
 	};
 
 	template <class T>
diff --git a/editor/property_editor.cpp b/editor/property_editor.cpp
index 6b02afe0c1e..a3a10c6c5a7 100644
--- a/editor/property_editor.cpp
+++ b/editor/property_editor.cpp
@@ -2370,7 +2370,7 @@ void PropertyEditor::set_item_text(TreeItem *p_item, int p_type, const String &p
 					p_item->set_text(1, res->get_path().get_file());
 				} else if (!res->is_class("Texture")) {
 					//texture already previews via itself
-					EditorResourcePreview::get_singleton()->queue_edited_resource_preview(res, this, "_resource_preview_done", p_item->get_instance_ID());
+					EditorResourcePreview::get_singleton()->queue_edited_resource_preview(res, this, "_resource_preview_done", p_item->get_instance_id());
 				}
 			}
 
@@ -3630,7 +3630,7 @@ void PropertyEditor::update_tree() {
 						item->set_text(1, res->get_path().get_file());
 					} else if (!res->is_class("Texture")) {
 						//texture already previews via itself
-						EditorResourcePreview::get_singleton()->queue_edited_resource_preview(res, this, "_resource_preview_done", item->get_instance_ID());
+						EditorResourcePreview::get_singleton()->queue_edited_resource_preview(res, this, "_resource_preview_done", item->get_instance_id());
 					}
 				}
 
@@ -4586,7 +4586,7 @@ void SectionedPropertyEditor::edit(Object *p_object) {
 		return;
 	}
 
-	ObjectID id = p_object->get_instance_ID();
+	ObjectID id = p_object->get_instance_id();
 
 	if (obj != id) {
 
diff --git a/editor/property_selector.cpp b/editor/property_selector.cpp
index c6af9936767..bd68eac9f24 100644
--- a/editor/property_selector.cpp
+++ b/editor/property_selector.cpp
@@ -418,7 +418,7 @@ void PropertySelector::select_method_from_script(const Ref<Script> &p_script, co
 	base_type = p_script->get_instance_base_type();
 	selected = p_current;
 	type = Variant::NIL;
-	script = p_script->get_instance_ID();
+	script = p_script->get_instance_id();
 	properties = false;
 	instance = NULL;
 
@@ -452,7 +452,7 @@ void PropertySelector::select_method_from_instance(Object *p_instance, const Str
 	{
 		Ref<Script> scr = p_instance->get_script();
 		if (scr.is_valid())
-			script = scr->get_instance_ID();
+			script = scr->get_instance_id();
 	}
 	properties = false;
 	instance = NULL;
@@ -485,7 +485,7 @@ void PropertySelector::select_property_from_script(const Ref<Script> &p_script,
 	base_type = p_script->get_instance_base_type();
 	selected = p_current;
 	type = Variant::NIL;
-	script = p_script->get_instance_ID();
+	script = p_script->get_instance_id();
 	properties = true;
 	instance = NULL;
 
diff --git a/editor/resources_dock.cpp b/editor/resources_dock.cpp
index d3b68d92e4f..db3bf6a3529 100644
--- a/editor/resources_dock.cpp
+++ b/editor/resources_dock.cpp
@@ -204,7 +204,7 @@ void ResourcesDock::_update_name(TreeItem *item) {
 	else if (res->get_path() != "" && res->get_path().find("::") == -1)
 		item->set_text(0, res->get_path().get_file());
 	else
-		item->set_text(0, res->get_class() + " (" + itos(res->get_instance_ID()) + ")");
+		item->set_text(0, res->get_class() + " (" + itos(res->get_instance_id()) + ")");
 }
 
 void ResourcesDock::remove_resource(const Ref<Resource> &p_resource) {
diff --git a/editor/scene_tree_dock.cpp b/editor/scene_tree_dock.cpp
index 47a91853892..ce3b85332f0 100644
--- a/editor/scene_tree_dock.cpp
+++ b/editor/scene_tree_dock.cpp
@@ -1369,8 +1369,8 @@ void SceneTreeDock::_delete_confirm() {
 			editor_data->get_undo_redo().add_undo_reference(n);
 
 			ScriptEditorDebugger *sed = ScriptEditor::get_singleton()->get_debugger();
-			editor_data->get_undo_redo().add_do_method(sed, "live_debug_remove_and_keep_node", edited_scene->get_path_to(n), n->get_instance_ID());
-			editor_data->get_undo_redo().add_undo_method(sed, "live_debug_restore_node", n->get_instance_ID(), edited_scene->get_path_to(n->get_parent()), n->get_index());
+			editor_data->get_undo_redo().add_do_method(sed, "live_debug_remove_and_keep_node", edited_scene->get_path_to(n), n->get_instance_id());
+			editor_data->get_undo_redo().add_undo_method(sed, "live_debug_restore_node", n->get_instance_id(), edited_scene->get_path_to(n->get_parent()), n->get_index());
 		}
 	}
 	editor_data->get_undo_redo().commit_action();
@@ -1824,7 +1824,7 @@ void SceneTreeDock::_add_children_to_popup(Object *p_obj, int p_depth) {
 		int index = menu->get_item_count();
 		menu->add_icon_item(icon, E->get().name.capitalize(), EDIT_SUBRESOURCE_BASE + subresources.size());
 		menu->set_item_h_offset(index, p_depth * 10 * EDSCALE);
-		subresources.push_back(obj->get_instance_ID());
+		subresources.push_back(obj->get_instance_id());
 
 		_add_children_to_popup(obj, p_depth + 1);
 	}
diff --git a/editor/scene_tree_editor.cpp b/editor/scene_tree_editor.cpp
index f35e0980657..390d13e64e1 100644
--- a/editor/scene_tree_editor.cpp
+++ b/editor/scene_tree_editor.cpp
@@ -411,9 +411,9 @@ void SceneTreeEditor::_update_tree() {
 
 void SceneTreeEditor::_compute_hash(Node *p_node, uint64_t &hash) {
 
-	hash = hash_djb2_one_64(p_node->get_instance_ID(), hash);
+	hash = hash_djb2_one_64(p_node->get_instance_id(), hash);
 	if (p_node->get_parent())
-		hash = hash_djb2_one_64(p_node->get_parent()->get_instance_ID(), hash); //so a reparent still produces a different hash
+		hash = hash_djb2_one_64(p_node->get_parent()->get_instance_id(), hash); //so a reparent still produces a different hash
 
 	for (int i = 0; i < p_node->get_child_count(); i++) {
 
@@ -625,8 +625,8 @@ void SceneTreeEditor::_renamed() {
 	} else {
 		undo_redo->create_action(TTR("Rename Node"));
 		emit_signal("node_prerename", n, new_name);
-		undo_redo->add_do_method(this, "_rename_node", n->get_instance_ID(), new_name);
-		undo_redo->add_undo_method(this, "_rename_node", n->get_instance_ID(), n->get_name());
+		undo_redo->add_do_method(this, "_rename_node", n->get_instance_id(), new_name);
+		undo_redo->add_undo_method(this, "_rename_node", n->get_instance_id(), n->get_name());
 		undo_redo->commit_action();
 	}
 }
diff --git a/editor/spatial_editor_gizmos.cpp b/editor/spatial_editor_gizmos.cpp
index faf9dee5d03..659a3cf0d28 100644
--- a/editor/spatial_editor_gizmos.cpp
+++ b/editor/spatial_editor_gizmos.cpp
@@ -70,7 +70,7 @@ void EditorSpatialGizmo::redraw() {
 void EditorSpatialGizmo::Instance::create_instance(Spatial *p_base) {
 
 	instance = VS::get_singleton()->instance_create2(mesh->get_rid(), p_base->get_world()->get_scenario());
-	VS::get_singleton()->instance_attach_object_instance_ID(instance, p_base->get_instance_ID());
+	VS::get_singleton()->instance_attach_object_instance_id(instance, p_base->get_instance_id());
 	if (skeleton.is_valid())
 		VS::get_singleton()->instance_attach_skeleton(instance, skeleton);
 	if (extra_margin)
diff --git a/main/main.cpp b/main/main.cpp
index ed6ed019f40..9376d832046 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -203,7 +203,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 
 	MAIN_PRINT("Main: Initialize Globals");
 
-	Thread::_main_thread_id = Thread::get_caller_ID();
+	Thread::_main_thread_id = Thread::get_caller_id();
 
 	globals = memnew(ProjectSettings);
 	input_map = memnew(InputMap);
diff --git a/misc/scripts/makeargs.py b/misc/scripts/makeargs.py
index 2cd47ae087d..26d9cc5a000 100644
--- a/misc/scripts/makeargs.py
+++ b/misc/scripts/makeargs.py
@@ -2,7 +2,7 @@
 text = """
 #define FUNC$numR(m_r,m_func,$argt)\\
 	virtual m_r m_func($argtp) { \\
-		if (Thread::get_caller_ID()!=server_thread) {\\
+		if (Thread::get_caller_id()!=server_thread) {\\
 			m_r ret;\\
 			command_queue.push_and_ret( visual_server, &VisualServer::m_func,$argp,&ret);\\
 			return ret;\\
@@ -13,7 +13,7 @@ text = """
 
 #define FUNC$numRC(m_r,m_func,$argt)\\
 	virtual m_r m_func($argtp) const { \\
-		if (Thread::get_caller_ID()!=server_thread) {\\
+		if (Thread::get_caller_id()!=server_thread) {\\
 			m_r ret;\\
 			command_queue.push_and_ret( visual_server, &VisualServer::m_func,$argp,&ret);\\
 			return ret;\\
@@ -25,7 +25,7 @@ text = """
 
 #define FUNC$numS(m_func,$argt)\\
 	virtual void m_func($argtp) { \\
-		if (Thread::get_caller_ID()!=server_thread) {\\
+		if (Thread::get_caller_id()!=server_thread) {\\
 			command_queue.push_and_sync( visual_server, &VisualServer::m_func,$argp);\\
 		} else {\\
 			visual_server->m_func($argp);\\
@@ -34,7 +34,7 @@ text = """
 
 #define FUNC$numSC(m_func,$argt)\\
 	virtual void m_func($argtp) const { \\
-		if (Thread::get_caller_ID()!=server_thread) {\\
+		if (Thread::get_caller_id()!=server_thread) {\\
 			command_queue.push_and_sync( visual_server, &VisualServer::m_func,$argp);\\
 		} else {\\
 			visual_server->m_func($argp);\\
@@ -44,7 +44,7 @@ text = """
 
 #define FUNC$num(m_func,$argt)\\
 	virtual void m_func($argtp) { \\
-		if (Thread::get_caller_ID()!=server_thread) {\\
+		if (Thread::get_caller_id()!=server_thread) {\\
 			command_queue.push( visual_server, &VisualServer::m_func,$argp);\\
 		} else {\\
 			visual_server->m_func($argp);\\
@@ -53,7 +53,7 @@ text = """
 
 #define FUNC$numC(m_func,$argt)\\
 	virtual void m_func($argtp) const { \\
-		if (Thread::get_caller_ID()!=server_thread) {\\
+		if (Thread::get_caller_id()!=server_thread) {\\
 			command_queue.push( visual_server, &VisualServer::m_func,$argp);\\
 		} else {\\
 			visual_server->m_func($argp);\\
diff --git a/modules/enet/networked_multiplayer_enet.cpp b/modules/enet/networked_multiplayer_enet.cpp
index 738bd27ed3f..68d5c9e611c 100644
--- a/modules/enet/networked_multiplayer_enet.cpp
+++ b/modules/enet/networked_multiplayer_enet.cpp
@@ -508,7 +508,7 @@ uint32_t NetworkedMultiplayerENet::_gen_unique_id() const {
 				(uint32_t)OS::get_singleton()->get_data_dir().hash64(), hash);
 		/*
 		hash = hash_djb2_one_32(
-					(uint32_t)OS::get_singleton()->get_unique_ID().hash64(), hash );
+					(uint32_t)OS::get_singleton()->get_unique_id().hash64(), hash );
 		*/
 		hash = hash_djb2_one_32(
 				(uint32_t)((uint64_t)this), hash); //rely on aslr heap
diff --git a/modules/gdscript/gd_editor.cpp b/modules/gdscript/gd_editor.cpp
index c88889767ce..f8b45af85a3 100644
--- a/modules/gdscript/gd_editor.cpp
+++ b/modules/gdscript/gd_editor.cpp
@@ -157,7 +157,7 @@ Script *GDScriptLanguage::create_script() const {
 bool GDScriptLanguage::debug_break_parse(const String &p_file, int p_line, const String &p_error) {
 	//break because of parse error
 
-	if (ScriptDebugger::get_singleton() && Thread::get_caller_ID() == Thread::get_main_ID()) {
+	if (ScriptDebugger::get_singleton() && Thread::get_caller_id() == Thread::get_main_id()) {
 
 		_debug_parse_err_line = p_line;
 		_debug_parse_err_file = p_file;
@@ -171,7 +171,7 @@ bool GDScriptLanguage::debug_break_parse(const String &p_file, int p_line, const
 
 bool GDScriptLanguage::debug_break(const String &p_error, bool p_allow_continue) {
 
-	if (ScriptDebugger::get_singleton() && Thread::get_caller_ID() == Thread::get_main_ID()) {
+	if (ScriptDebugger::get_singleton() && Thread::get_caller_id() == Thread::get_main_id()) {
 
 		_debug_parse_err_line = -1;
 		_debug_parse_err_file = "";
diff --git a/modules/gdscript/gd_function.cpp b/modules/gdscript/gd_function.cpp
index 795371af603..4f8fbd6b467 100644
--- a/modules/gdscript/gd_function.cpp
+++ b/modules/gdscript/gd_function.cpp
@@ -888,8 +888,8 @@ Variant GDFunction::call(GDInstance *p_instance, const Variant **p_args, int p_a
 				gdfs->state._class = _class;
 				gdfs->state.ip = ip + ipofs;
 				gdfs->state.line = line;
-				gdfs->state.instance_id = (p_instance && p_instance->get_owner()) ? p_instance->get_owner()->get_instance_ID() : 0;
-				gdfs->state.script_id = _class->get_instance_ID();
+				gdfs->state.instance_id = (p_instance && p_instance->get_owner()) ? p_instance->get_owner()->get_instance_id() : 0;
+				gdfs->state.script_id = _class->get_instance_id();
 				//gdfs->state.result_pos=ip+ipofs-1;
 				gdfs->state.defarg = defarg;
 				gdfs->state.instance = p_instance;
diff --git a/modules/gdscript/gd_script.cpp b/modules/gdscript/gd_script.cpp
index fe87433a897..9d304c6d347 100644
--- a/modules/gdscript/gd_script.cpp
+++ b/modules/gdscript/gd_script.cpp
@@ -479,7 +479,7 @@ bool GDScript::_update_exports() {
 			const GDParser::ClassNode *c = static_cast<const GDParser::ClassNode *>(root);
 
 			if (base_cache.is_valid()) {
-				base_cache->inheriters_cache.erase(get_instance_ID());
+				base_cache->inheriters_cache.erase(get_instance_id());
 				base_cache = Ref<GDScript>();
 			}
 
@@ -505,7 +505,7 @@ bool GDScript::_update_exports() {
 
 						//print_line("parent is: "+bf->get_path());
 						base_cache = bf;
-						bf->inheriters_cache.insert(get_instance_ID());
+						bf->inheriters_cache.insert(get_instance_id());
 
 						//bf->_update_exports(p_instances,true,false);
 					}
@@ -1693,7 +1693,7 @@ void GDScriptLanguage::reload_tool_script(const Ref<Script> &p_script, bool p_so
 				if (obj->get_script_instance()) {
 
 					obj->get_script_instance()->get_property_state(state);
-					map[obj->get_instance_ID()] = state;
+					map[obj->get_instance_id()] = state;
 					obj->set_script(RefPtr());
 				}
 			}
@@ -1709,7 +1709,7 @@ void GDScriptLanguage::reload_tool_script(const Ref<Script> &p_script, bool p_so
 				if (obj->get_script_instance()) {
 
 					obj->get_script_instance()->get_property_state(state);
-					map[obj->get_instance_ID()] = state;
+					map[obj->get_instance_id()] = state;
 					obj->set_script(RefPtr());
 				} else {
 					// no instance found. Let's remove it so we don't loop forever
@@ -1743,8 +1743,8 @@ void GDScriptLanguage::reload_tool_script(const Ref<Script> &p_script, bool p_so
 			obj->set_script(scr.get_ref_ptr());
 			if (!obj->get_script_instance()) {
 				//failed, save reload state for next time if not saved
-				if (!scr->pending_reload_state.has(obj->get_instance_ID())) {
-					scr->pending_reload_state[obj->get_instance_ID()] = F->get();
+				if (!scr->pending_reload_state.has(obj->get_instance_id())) {
+					scr->pending_reload_state[obj->get_instance_id()] = F->get();
 				}
 				continue;
 			}
@@ -1753,7 +1753,7 @@ void GDScriptLanguage::reload_tool_script(const Ref<Script> &p_script, bool p_so
 				obj->get_script_instance()->set(G->get().first, G->get().second);
 			}
 
-			scr->pending_reload_state.erase(obj->get_instance_ID()); //as it reloaded, remove pending state
+			scr->pending_reload_state.erase(obj->get_instance_id()); //as it reloaded, remove pending state
 		}
 
 		//if instance states were saved, set them!
diff --git a/modules/gdscript/gd_script.h b/modules/gdscript/gd_script.h
index 0add348ca92..17e7b0bc03b 100644
--- a/modules/gdscript/gd_script.h
+++ b/modules/gdscript/gd_script.h
@@ -298,7 +298,7 @@ public:
 
 	_FORCE_INLINE_ void enter_function(GDInstance *p_instance, GDFunction *p_function, Variant *p_stack, int *p_ip, int *p_line) {
 
-		if (Thread::get_main_ID() != Thread::get_caller_ID())
+		if (Thread::get_main_id() != Thread::get_caller_id())
 			return; //no support for other threads than main for now
 
 		if (ScriptDebugger::get_singleton()->get_lines_left() > 0 && ScriptDebugger::get_singleton()->get_depth() >= 0)
@@ -321,7 +321,7 @@ public:
 
 	_FORCE_INLINE_ void exit_function() {
 
-		if (Thread::get_main_ID() != Thread::get_caller_ID())
+		if (Thread::get_main_id() != Thread::get_caller_id())
 			return; //no support for other threads than main for now
 
 		if (ScriptDebugger::get_singleton()->get_lines_left() > 0 && ScriptDebugger::get_singleton()->get_depth() >= 0)
@@ -338,7 +338,7 @@ public:
 	}
 
 	virtual Vector<StackInfo> debug_get_current_stack_info() {
-		if (Thread::get_main_ID() != Thread::get_caller_ID())
+		if (Thread::get_main_id() != Thread::get_caller_id())
 			return Vector<StackInfo>();
 
 		Vector<StackInfo> csi;
diff --git a/modules/gridmap/grid_map.cpp b/modules/gridmap/grid_map.cpp
index 8c2c2ea3451..02e62ba3ee6 100644
--- a/modules/gridmap/grid_map.cpp
+++ b/modules/gridmap/grid_map.cpp
@@ -345,7 +345,7 @@ void GridMap::set_cell_item(int p_x, int p_y, int p_z, int p_item, int p_rot) {
 		Octant *g = memnew(Octant);
 		g->dirty = true;
 		g->static_body = PhysicsServer::get_singleton()->body_create(PhysicsServer::BODY_MODE_STATIC);
-		PhysicsServer::get_singleton()->body_attach_object_instance_ID(g->static_body, get_instance_ID());
+		PhysicsServer::get_singleton()->body_attach_object_instance_id(g->static_body, get_instance_id());
 		if (is_inside_world())
 			PhysicsServer::get_singleton()->body_set_space(g->static_body, get_world()->get_space());
 
diff --git a/modules/nativescript/nativescript.cpp b/modules/nativescript/nativescript.cpp
index fb334e573c9..f00917bcea0 100644
--- a/modules/nativescript/nativescript.cpp
+++ b/modules/nativescript/nativescript.cpp
@@ -113,7 +113,7 @@ void NativeScript::set_library(Ref<GDNativeLibrary> p_library) {
 	lib_path = library->get_active_library_path();
 
 #ifndef NO_THREADS
-	if (Thread::get_caller_ID() != Thread::get_main_ID()) {
+	if (Thread::get_caller_id() != Thread::get_main_id()) {
 		NSL->defer_init_library(p_library, this);
 	} else
 #endif
diff --git a/modules/visual_script/visual_script.cpp b/modules/visual_script/visual_script.cpp
index f15abec7e2d..376329715b9 100644
--- a/modules/visual_script/visual_script.cpp
+++ b/modules/visual_script/visual_script.cpp
@@ -1607,8 +1607,8 @@ Variant VisualScriptInstance::_call_internal(const StringName &p_method, void *p
 				}
 
 				//step 1, capture all state
-				state->instance_id = get_owner_ptr()->get_instance_ID();
-				state->script_id = get_script()->get_instance_ID();
+				state->instance_id = get_owner_ptr()->get_instance_id();
+				state->script_id = get_script()->get_instance_id();
 				state->instance = this;
 				state->function = p_method;
 				state->working_mem_index = node->working_mem_idx;
@@ -2417,7 +2417,7 @@ void VisualScriptLanguage::add_global_constant(const StringName &p_variable, con
 bool VisualScriptLanguage::debug_break_parse(const String &p_file, int p_node, const String &p_error) {
 	//break because of parse error
 
-	if (ScriptDebugger::get_singleton() && Thread::get_caller_ID() == Thread::get_main_ID()) {
+	if (ScriptDebugger::get_singleton() && Thread::get_caller_id() == Thread::get_main_id()) {
 
 		_debug_parse_err_node = p_node;
 		_debug_parse_err_file = p_file;
@@ -2431,7 +2431,7 @@ bool VisualScriptLanguage::debug_break_parse(const String &p_file, int p_node, c
 
 bool VisualScriptLanguage::debug_break(const String &p_error, bool p_allow_continue) {
 
-	if (ScriptDebugger::get_singleton() && Thread::get_caller_ID() == Thread::get_main_ID()) {
+	if (ScriptDebugger::get_singleton() && Thread::get_caller_id() == Thread::get_main_id()) {
 
 		_debug_parse_err_node = -1;
 		_debug_parse_err_file = "";
diff --git a/modules/visual_script/visual_script.h b/modules/visual_script/visual_script.h
index cdd7eded181..63ac5769c61 100644
--- a/modules/visual_script/visual_script.h
+++ b/modules/visual_script/visual_script.h
@@ -509,7 +509,7 @@ public:
 
 	_FORCE_INLINE_ void enter_function(VisualScriptInstance *p_instance, const StringName *p_function, Variant *p_stack, Variant **p_work_mem, int *current_id) {
 
-		if (Thread::get_main_ID() != Thread::get_caller_ID())
+		if (Thread::get_main_id() != Thread::get_caller_id())
 			return; //no support for other threads than main for now
 
 		if (ScriptDebugger::get_singleton()->get_lines_left() > 0 && ScriptDebugger::get_singleton()->get_depth() >= 0)
@@ -532,7 +532,7 @@ public:
 
 	_FORCE_INLINE_ void exit_function() {
 
-		if (Thread::get_main_ID() != Thread::get_caller_ID())
+		if (Thread::get_main_id() != Thread::get_caller_id())
 			return; //no support for other threads than main for now
 
 		if (ScriptDebugger::get_singleton()->get_lines_left() > 0 && ScriptDebugger::get_singleton()->get_depth() >= 0)
diff --git a/modules/visual_script/visual_script_editor.cpp b/modules/visual_script/visual_script_editor.cpp
index 35358d5a1f3..a71d38f7a0a 100644
--- a/modules/visual_script/visual_script_editor.cpp
+++ b/modules/visual_script/visual_script_editor.cpp
@@ -615,7 +615,7 @@ void VisualScriptEditor::_update_graph(int p_only_id) {
 
 						Ref<Resource> res = value;
 						Array arr;
-						arr.push_back(button->get_instance_ID());
+						arr.push_back(button->get_instance_id());
 						arr.push_back(String(value));
 						EditorResourcePreview::get_singleton()->queue_edited_resource_preview(res, this, "_button_resource_previewed", arr);
 
@@ -1969,7 +1969,7 @@ String VisualScriptEditor::get_name() {
 	} else if (script->get_name() != "")
 		name = script->get_name();
 	else
-		name = script->get_class() + "(" + itos(script->get_instance_ID()) + ")";
+		name = script->get_class() + "(" + itos(script->get_instance_id()) + ")";
 
 	return name;
 }
diff --git a/modules/visual_script/visual_script_func_nodes.cpp b/modules/visual_script/visual_script_func_nodes.cpp
index c438edd21f2..3c057cdbd55 100644
--- a/modules/visual_script/visual_script_func_nodes.cpp
+++ b/modules/visual_script/visual_script_func_nodes.cpp
@@ -603,13 +603,13 @@ void VisualScriptFunctionCall::_validate_property(PropertyInfo &property) const
 
 		} else if (call_mode == CALL_MODE_SELF && get_visual_script().is_valid()) {
 			property.hint = PROPERTY_HINT_METHOD_OF_SCRIPT;
-			property.hint_string = itos(get_visual_script()->get_instance_ID());
+			property.hint_string = itos(get_visual_script()->get_instance_id());
 		} else if (call_mode == CALL_MODE_SINGLETON) {
 
 			Object *obj = ProjectSettings::get_singleton()->get_singleton_object(singleton);
 			if (obj) {
 				property.hint = PROPERTY_HINT_METHOD_OF_INSTANCE;
-				property.hint_string = itos(obj->get_instance_ID());
+				property.hint_string = itos(obj->get_instance_id());
 			} else {
 
 				property.hint = PROPERTY_HINT_METHOD_OF_BASE_TYPE;
@@ -631,7 +631,7 @@ void VisualScriptFunctionCall::_validate_property(PropertyInfo &property) const
 					if (script.is_valid()) {
 
 						property.hint = PROPERTY_HINT_METHOD_OF_SCRIPT;
-						property.hint_string = itos(script->get_instance_ID());
+						property.hint_string = itos(script->get_instance_id());
 					}
 				}
 			}
@@ -640,7 +640,7 @@ void VisualScriptFunctionCall::_validate_property(PropertyInfo &property) const
 			Node *node = _get_base_node();
 			if (node) {
 				property.hint = PROPERTY_HINT_METHOD_OF_INSTANCE;
-				property.hint_string = itos(node->get_instance_ID());
+				property.hint_string = itos(node->get_instance_id());
 			} else {
 				property.hint = PROPERTY_HINT_METHOD_OF_BASE_TYPE;
 				property.hint_string = get_base_type();
@@ -1379,7 +1379,7 @@ void VisualScriptPropertySet::_validate_property(PropertyInfo &property) const {
 
 		} else if (call_mode == CALL_MODE_SELF && get_visual_script().is_valid()) {
 			property.hint = PROPERTY_HINT_PROPERTY_OF_SCRIPT;
-			property.hint_string = itos(get_visual_script()->get_instance_ID());
+			property.hint_string = itos(get_visual_script()->get_instance_id());
 		} else if (call_mode == CALL_MODE_INSTANCE) {
 			property.hint = PROPERTY_HINT_PROPERTY_OF_BASE_TYPE;
 			property.hint_string = base_type;
@@ -1396,7 +1396,7 @@ void VisualScriptPropertySet::_validate_property(PropertyInfo &property) const {
 					if (script.is_valid()) {
 
 						property.hint = PROPERTY_HINT_PROPERTY_OF_SCRIPT;
-						property.hint_string = itos(script->get_instance_ID());
+						property.hint_string = itos(script->get_instance_id());
 					}
 				}
 			}
@@ -1405,7 +1405,7 @@ void VisualScriptPropertySet::_validate_property(PropertyInfo &property) const {
 			Node *node = _get_base_node();
 			if (node) {
 				property.hint = PROPERTY_HINT_PROPERTY_OF_INSTANCE;
-				property.hint_string = itos(node->get_instance_ID());
+				property.hint_string = itos(node->get_instance_id());
 			} else {
 				property.hint = PROPERTY_HINT_PROPERTY_OF_BASE_TYPE;
 				property.hint_string = get_base_type();
@@ -2095,7 +2095,7 @@ void VisualScriptPropertyGet::_validate_property(PropertyInfo &property) const {
 
 		} else if (call_mode == CALL_MODE_SELF && get_visual_script().is_valid()) {
 			property.hint = PROPERTY_HINT_PROPERTY_OF_SCRIPT;
-			property.hint_string = itos(get_visual_script()->get_instance_ID());
+			property.hint_string = itos(get_visual_script()->get_instance_id());
 		} else if (call_mode == CALL_MODE_INSTANCE) {
 			property.hint = PROPERTY_HINT_PROPERTY_OF_BASE_TYPE;
 			property.hint_string = base_type;
@@ -2112,7 +2112,7 @@ void VisualScriptPropertyGet::_validate_property(PropertyInfo &property) const {
 					if (script.is_valid()) {
 
 						property.hint = PROPERTY_HINT_PROPERTY_OF_SCRIPT;
-						property.hint_string = itos(script->get_instance_ID());
+						property.hint_string = itos(script->get_instance_id());
 					}
 				}
 			}
@@ -2120,7 +2120,7 @@ void VisualScriptPropertyGet::_validate_property(PropertyInfo &property) const {
 			Node *node = _get_base_node();
 			if (node) {
 				property.hint = PROPERTY_HINT_PROPERTY_OF_INSTANCE;
-				property.hint_string = itos(node->get_instance_ID());
+				property.hint_string = itos(node->get_instance_id());
 			} else {
 				property.hint = PROPERTY_HINT_PROPERTY_OF_BASE_TYPE;
 				property.hint_string = get_base_type();
diff --git a/platform/android/java_glue.cpp b/platform/android/java_glue.cpp
index 0508989d2f4..683e1cfb224 100644
--- a/platform/android/java_glue.cpp
+++ b/platform/android/java_glue.cpp
@@ -895,7 +895,7 @@ JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_initialize(JNIEnv *en
 
 JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_resize(JNIEnv *env, jobject obj, jint width, jint height, jboolean reload) {
 
-	__android_log_print(ANDROID_LOG_INFO, "godot", "^_^_^_^_^ resize %lld, %i, %i\n", Thread::get_caller_ID(), width, height);
+	__android_log_print(ANDROID_LOG_INFO, "godot", "^_^_^_^_^ resize %lld, %i, %i\n", Thread::get_caller_id(), width, height);
 	if (os_android)
 		os_android->set_display_size(Size2(width, height));
 
@@ -909,7 +909,7 @@ JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_resize(JNIEnv *env, j
 
 JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_newcontext(JNIEnv *env, jobject obj, bool p_32_bits) {
 
-	__android_log_print(ANDROID_LOG_INFO, "godot", "^_^_^_^_^ newcontext %lld\n", Thread::get_caller_ID());
+	__android_log_print(ANDROID_LOG_INFO, "godot", "^_^_^_^_^ newcontext %lld\n", Thread::get_caller_id());
 
 	if (os_android) {
 		os_android->set_context_is_16_bits(!p_32_bits);
@@ -995,7 +995,7 @@ JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_step(JNIEnv *env, job
 
 	ThreadAndroid::setup_thread();
 
-	//__android_log_print(ANDROID_LOG_INFO,"godot","**STEP EVENT! - %p-%i\n",env,Thread::get_caller_ID());
+	//__android_log_print(ANDROID_LOG_INFO,"godot","**STEP EVENT! - %p-%i\n",env,Thread::get_caller_id());
 
 	suspend_mutex->lock();
 	input_mutex->lock();
@@ -1069,7 +1069,7 @@ JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_step(JNIEnv *env, job
 		jclass cls = env->FindClass("org/godotengine/godot/Godot");
 		jmethodID _finish = env->GetMethodID(cls, "forceQuit", "()V");
 		env->CallVoidMethod(_godot_instance, _finish);
-		__android_log_print(ANDROID_LOG_INFO, "godot", "**FINISH REQUEST!!! - %p-%i\n", env, Thread::get_caller_ID());
+		__android_log_print(ANDROID_LOG_INFO, "godot", "**FINISH REQUEST!!! - %p-%i\n", env, Thread::get_caller_id());
 	}
 
 	suspend_mutex->unlock();
@@ -1077,7 +1077,7 @@ JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_step(JNIEnv *env, job
 
 JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_touch(JNIEnv *env, jobject obj, jint ev, jint pointer, jint count, jintArray positions) {
 
-	//__android_log_print(ANDROID_LOG_INFO,"godot","**TOUCH EVENT! - %p-%i\n",env,Thread::get_caller_ID());
+	//__android_log_print(ANDROID_LOG_INFO,"godot","**TOUCH EVENT! - %p-%i\n",env,Thread::get_caller_id());
 
 	Vector<OS_Android::TouchPos> points;
 	for (int i = 0; i < count; i++) {
diff --git a/platform/android/os_android.cpp b/platform/android/os_android.cpp
index ad46ceb43f9..e3f982ff94d 100644
--- a/platform/android/os_android.cpp
+++ b/platform/android/os_android.cpp
@@ -686,11 +686,11 @@ void OS_Android::set_screen_orientation(ScreenOrientation p_orientation) {
 		set_screen_orientation_func(p_orientation);
 }
 
-String OS_Android::get_unique_ID() const {
+String OS_Android::get_unique_id() const {
 
 	if (get_unique_id_func)
 		return get_unique_id_func();
-	return OS::get_unique_ID();
+	return OS::get_unique_id();
 }
 
 Error OS_Android::native_video_play(String p_path, float p_volume) {
diff --git a/platform/android/os_android.h b/platform/android/os_android.h
index 393bc68d8a3..54d7e562e0c 100644
--- a/platform/android/os_android.h
+++ b/platform/android/os_android.h
@@ -222,7 +222,7 @@ public:
 	virtual String get_model_name() const;
 	virtual int get_screen_dpi(int p_screen = 0) const;
 
-	virtual String get_unique_ID() const;
+	virtual String get_unique_id() const;
 
 	virtual String get_system_dir(SystemDir p_dir) const;
 
diff --git a/platform/android/thread_jandroid.cpp b/platform/android/thread_jandroid.cpp
index 401f3cd73bd..924ae3fe43a 100644
--- a/platform/android/thread_jandroid.cpp
+++ b/platform/android/thread_jandroid.cpp
@@ -32,7 +32,7 @@
 #include "os/memory.h"
 #include "script_language.h"
 
-Thread::ID ThreadAndroid::get_ID() const {
+Thread::ID ThreadAndroid::get_id() const {
 
 	return id;
 }
@@ -66,7 +66,7 @@ Thread *ThreadAndroid::create_func_jandroid(ThreadCreateCallback p_callback, voi
 	return tr;
 }
 
-Thread::ID ThreadAndroid::get_thread_ID_func_jandroid() {
+Thread::ID ThreadAndroid::get_thread_id_func_jandroid() {
 
 	return (ID)pthread_self();
 }
@@ -107,7 +107,7 @@ void ThreadAndroid::make_default(JavaVM *p_java_vm) {
 
 	java_vm = p_java_vm;
 	create_func = create_func_jandroid;
-	get_thread_ID_func = get_thread_ID_func_jandroid;
+	get_thread_id_func = get_thread_id_func_jandroid;
 	wait_to_finish_func = wait_to_finish_func_jandroid;
 	pthread_key_create(&jvm_key, _thread_destroyed);
 	setup_thread();
diff --git a/platform/android/thread_jandroid.h b/platform/android/thread_jandroid.h
index 61740669689..52673297448 100644
--- a/platform/android/thread_jandroid.h
+++ b/platform/android/thread_jandroid.h
@@ -52,7 +52,7 @@ class ThreadAndroid : public Thread {
 	static void *thread_callback(void *userdata);
 
 	static Thread *create_func_jandroid(ThreadCreateCallback p_callback, void *, const Settings &);
-	static ID get_thread_ID_func_jandroid();
+	static ID get_thread_id_func_jandroid();
 	static void wait_to_finish_func_jandroid(Thread *p_thread);
 
 	static void _thread_destroyed(void *value);
@@ -62,7 +62,7 @@ class ThreadAndroid : public Thread {
 	static JavaVM *java_vm;
 
 public:
-	virtual ID get_ID() const;
+	virtual ID get_id() const;
 
 	static void make_default(JavaVM *p_java_vm);
 	static void setup_thread();
diff --git a/platform/iphone/app_delegate.mm b/platform/iphone/app_delegate.mm
index da6dfcf53fe..362cfd1478a 100644
--- a/platform/iphone/app_delegate.mm
+++ b/platform/iphone/app_delegate.mm
@@ -424,7 +424,7 @@ static int frame_count = 0;
 				}
 			}
 
-			OSIPhone::get_singleton()->set_unique_ID(String::utf8([uuid UTF8String]));
+			OSIPhone::get_singleton()->set_unique_id(String::utf8([uuid UTF8String]));
 
 		}; break;
 		/*
diff --git a/platform/iphone/os_iphone.cpp b/platform/iphone/os_iphone.cpp
index cb5c022764b..f2c01a5f511 100644
--- a/platform/iphone/os_iphone.cpp
+++ b/platform/iphone/os_iphone.cpp
@@ -83,12 +83,12 @@ void OSIPhone::set_data_dir(String p_dir) {
 	memdelete(da);
 };
 
-void OSIPhone::set_unique_ID(String p_ID) {
+void OSIPhone::set_unique_id(String p_ID) {
 
 	unique_ID = p_ID;
 };
 
-String OSIPhone::get_unique_ID() const {
+String OSIPhone::get_unique_id() const {
 
 	return unique_ID;
 };
diff --git a/platform/iphone/os_iphone.h b/platform/iphone/os_iphone.h
index b15e9fdffbe..cf2766bb330 100644
--- a/platform/iphone/os_iphone.h
+++ b/platform/iphone/os_iphone.h
@@ -190,8 +190,8 @@ public:
 	void set_locale(String p_locale);
 	String get_locale() const;
 
-	void set_unique_ID(String p_ID);
-	String get_unique_ID() const;
+	void set_unique_id(String p_ID);
+	String get_unique_id() const;
 
 	virtual Error native_video_play(String p_path, float p_volume, String p_audio_track, String p_subtitle_track);
 	virtual bool native_video_is_playing() const;
diff --git a/platform/uwp/thread_uwp.cpp b/platform/uwp/thread_uwp.cpp
index 436941707cc..0549a8ed470 100644
--- a/platform/uwp/thread_uwp.cpp
+++ b/platform/uwp/thread_uwp.cpp
@@ -41,7 +41,7 @@ Thread *ThreadUWP::create_func_uwp(ThreadCreateCallback p_callback, void *p_user
 	return thread;
 };
 
-Thread::ID ThreadUWP::get_thread_ID_func_uwp() {
+Thread::ID ThreadUWP::get_thread_id_func_uwp() {
 
 	return std::hash<std::thread::id>()(std::this_thread::get_id());
 };
@@ -52,14 +52,14 @@ void ThreadUWP::wait_to_finish_func_uwp(Thread *p_thread) {
 	tp->thread.join();
 };
 
-Thread::ID ThreadUWP::get_ID() const {
+Thread::ID ThreadUWP::get_id() const {
 
 	return std::hash<std::thread::id>()(thread.get_id());
 };
 
 void ThreadUWP::make_default() {
 	create_func = create_func_uwp;
-	get_thread_ID_func = get_thread_ID_func_uwp;
+	get_thread_id_func = get_thread_id_func_uwp;
 	wait_to_finish_func = wait_to_finish_func_uwp;
 };
 
diff --git a/platform/uwp/thread_uwp.h b/platform/uwp/thread_uwp.h
index 0424f0f5771..b8cccfb7c33 100644
--- a/platform/uwp/thread_uwp.h
+++ b/platform/uwp/thread_uwp.h
@@ -41,13 +41,13 @@ class ThreadUWP : public Thread {
 	std::thread thread;
 
 	static Thread *create_func_uwp(ThreadCreateCallback p_callback, void *, const Settings &);
-	static ID get_thread_ID_func_uwp();
+	static ID get_thread_id_func_uwp();
 	static void wait_to_finish_func_uwp(Thread *p_thread);
 
 	ThreadUWP();
 
 public:
-	virtual ID get_ID() const;
+	virtual ID get_id() const;
 
 	static void make_default();
 
diff --git a/platform/windows/os_windows.cpp b/platform/windows/os_windows.cpp
index a7e7bcd883d..a1677be58e6 100644
--- a/platform/windows/os_windows.cpp
+++ b/platform/windows/os_windows.cpp
@@ -1952,7 +1952,7 @@ Error OS_Windows::kill(const ProcessID &p_pid) {
 	return ret != 0 ? OK : FAILED;
 };
 
-int OS_Windows::get_process_ID() const {
+int OS_Windows::get_process_id() const {
 	return _getpid();
 }
 
diff --git a/platform/windows/os_windows.h b/platform/windows/os_windows.h
index 6856e7e9b87..beaf5d5e35c 100644
--- a/platform/windows/os_windows.h
+++ b/platform/windows/os_windows.h
@@ -247,7 +247,7 @@ public:
 
 	virtual Error execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id = NULL, String *r_pipe = NULL, int *r_exitcode = NULL);
 	virtual Error kill(const ProcessID &p_pid);
-	virtual int get_process_ID() const;
+	virtual int get_process_id() const;
 
 	virtual bool has_environment(const String &p_var) const;
 	virtual String get_environment(const String &p_var) const;
diff --git a/scene/2d/area_2d.cpp b/scene/2d/area_2d.cpp
index 841e2ef7d35..02a0509449f 100644
--- a/scene/2d/area_2d.cpp
+++ b/scene/2d/area_2d.cpp
@@ -480,7 +480,7 @@ Array Area2D::get_overlapping_areas() const {
 bool Area2D::overlaps_area(Node *p_area) const {
 
 	ERR_FAIL_NULL_V(p_area, false);
-	const Map<ObjectID, AreaState>::Element *E = area_map.find(p_area->get_instance_ID());
+	const Map<ObjectID, AreaState>::Element *E = area_map.find(p_area->get_instance_id());
 	if (!E)
 		return false;
 	return E->get().in_tree;
@@ -489,7 +489,7 @@ bool Area2D::overlaps_area(Node *p_area) const {
 bool Area2D::overlaps_body(Node *p_body) const {
 
 	ERR_FAIL_NULL_V(p_body, false);
-	const Map<ObjectID, BodyState>::Element *E = body_map.find(p_body->get_instance_ID());
+	const Map<ObjectID, BodyState>::Element *E = body_map.find(p_body->get_instance_id());
 	if (!E)
 		return false;
 	return E->get().in_tree;
diff --git a/scene/2d/camera_2d.cpp b/scene/2d/camera_2d.cpp
index 908c95b50c9..93bfc6f705d 100644
--- a/scene/2d/camera_2d.cpp
+++ b/scene/2d/camera_2d.cpp
@@ -580,7 +580,7 @@ void Camera2D::set_custom_viewport(Node *p_viewport) {
 	custom_viewport = p_viewport->cast_to<Viewport>();
 
 	if (custom_viewport) {
-		custom_viewport_id = custom_viewport->get_instance_ID();
+		custom_viewport_id = custom_viewport->get_instance_id();
 	} else {
 		custom_viewport_id = 0;
 	}
diff --git a/scene/2d/collision_object_2d.cpp b/scene/2d/collision_object_2d.cpp
index eb47682884a..45f956ea979 100644
--- a/scene/2d/collision_object_2d.cpp
+++ b/scene/2d/collision_object_2d.cpp
@@ -372,9 +372,9 @@ CollisionObject2D::CollisionObject2D(RID p_rid, bool p_area) {
 
 	if (p_area) {
 
-		Physics2DServer::get_singleton()->area_attach_object_instance_ID(rid, get_instance_ID());
+		Physics2DServer::get_singleton()->area_attach_object_instance_id(rid, get_instance_id());
 	} else {
-		Physics2DServer::get_singleton()->body_attach_object_instance_ID(rid, get_instance_ID());
+		Physics2DServer::get_singleton()->body_attach_object_instance_id(rid, get_instance_id());
 	}
 }
 
diff --git a/scene/2d/remote_transform_2d.cpp b/scene/2d/remote_transform_2d.cpp
index 42983774993..cbd7ac06f57 100644
--- a/scene/2d/remote_transform_2d.cpp
+++ b/scene/2d/remote_transform_2d.cpp
@@ -39,7 +39,7 @@ void RemoteTransform2D::_update_cache() {
 			return;
 		}
 
-		cache = node->get_instance_ID();
+		cache = node->get_instance_id();
 	}
 }
 
diff --git a/scene/2d/tile_map.cpp b/scene/2d/tile_map.cpp
index 02dcc7d059b..f8bf3edb998 100644
--- a/scene/2d/tile_map.cpp
+++ b/scene/2d/tile_map.cpp
@@ -589,7 +589,7 @@ Map<TileMap::PosKey, TileMap::Quadrant>::Element *TileMap::_create_quadrant(cons
 	xform.set_origin(q.pos);
 	//q.canvas_item = VisualServer::get_singleton()->canvas_item_create();
 	q.body = Physics2DServer::get_singleton()->body_create(use_kinematic ? Physics2DServer::BODY_MODE_KINEMATIC : Physics2DServer::BODY_MODE_STATIC);
-	Physics2DServer::get_singleton()->body_attach_object_instance_ID(q.body, get_instance_ID());
+	Physics2DServer::get_singleton()->body_attach_object_instance_id(q.body, get_instance_id());
 	Physics2DServer::get_singleton()->body_set_collision_layer(q.body, collision_layer);
 	Physics2DServer::get_singleton()->body_set_collision_mask(q.body, collision_mask);
 	Physics2DServer::get_singleton()->body_set_param(q.body, Physics2DServer::BODY_PARAM_FRICTION, friction);
diff --git a/scene/3d/area.cpp b/scene/3d/area.cpp
index 59227070b30..c64b807e43b 100644
--- a/scene/3d/area.cpp
+++ b/scene/3d/area.cpp
@@ -475,7 +475,7 @@ Array Area::get_overlapping_areas() const {
 bool Area::overlaps_area(Node *p_area) const {
 
 	ERR_FAIL_NULL_V(p_area, false);
-	const Map<ObjectID, AreaState>::Element *E = area_map.find(p_area->get_instance_ID());
+	const Map<ObjectID, AreaState>::Element *E = area_map.find(p_area->get_instance_id());
 	if (!E)
 		return false;
 	return E->get().in_tree;
@@ -484,7 +484,7 @@ bool Area::overlaps_area(Node *p_area) const {
 bool Area::overlaps_body(Node *p_body) const {
 
 	ERR_FAIL_NULL_V(p_body, false);
-	const Map<ObjectID, BodyState>::Element *E = body_map.find(p_body->get_instance_ID());
+	const Map<ObjectID, BodyState>::Element *E = body_map.find(p_body->get_instance_id());
 	if (!E)
 		return false;
 	return E->get().in_tree;
diff --git a/scene/3d/collision_object.cpp b/scene/3d/collision_object.cpp
index 5a3d8e013fe..2686cd81df5 100644
--- a/scene/3d/collision_object.cpp
+++ b/scene/3d/collision_object.cpp
@@ -346,9 +346,9 @@ CollisionObject::CollisionObject(RID p_rid, bool p_area) {
 	total_subshapes = 0;
 
 	if (p_area) {
-		PhysicsServer::get_singleton()->area_attach_object_instance_ID(rid, get_instance_ID());
+		PhysicsServer::get_singleton()->area_attach_object_instance_id(rid, get_instance_id());
 	} else {
-		PhysicsServer::get_singleton()->body_attach_object_instance_ID(rid, get_instance_ID());
+		PhysicsServer::get_singleton()->body_attach_object_instance_id(rid, get_instance_id());
 	}
 	//set_transform_notify(true);
 }
diff --git a/scene/3d/physics_joint.cpp b/scene/3d/physics_joint.cpp
index 3fb5c828c25..61d496935b6 100644
--- a/scene/3d/physics_joint.cpp
+++ b/scene/3d/physics_joint.cpp
@@ -979,9 +979,9 @@ Generic6DOFJoint::Generic6DOFJoint() {
 void PhysicsJoint::_set(const String& p_name, const Variant& p_value) {
 
 	if (p_name=="body_A")
-		set_body_A(p_value);
+		set_body_a(p_value);
 	else if (p_name=="body_B")
-		set_body_B(p_value);
+		set_body_b(p_value);
 	else if (p_name=="active")
 		set_active(p_value);
 	else if (p_name=="no_collision")
@@ -990,9 +990,9 @@ void PhysicsJoint::_set(const String& p_name, const Variant& p_value) {
 Variant PhysicsJoint::_get(const String& p_name) const {
 
 	if (p_name=="body_A")
-		return get_body_A();
+		return get_body_a();
 	else if (p_name=="body_B")
-		return get_body_B();
+		return get_body_b();
 	else if (p_name=="active")
 		return is_active();
 	else if (p_name=="no_collision")
@@ -1034,7 +1034,7 @@ void PhysicsJoint::_notification(int p_what) {
 			if (indicator.is_valid()) {
 
 				indicator_instance=VisualServer::get_singleton()->instance_create(indicator,get_world()->get_scenario());
-				VisualServer::get_singleton()->instance_attach_object_instance_ID( indicator_instance,get_instance_ID() );
+				VisualServer::get_singleton()->instance_attach_object_instance_id( indicator_instance,get_instance_id() );
 			}
 		} break;
 		case NOTIFICATION_TRANSFORM_CHANGED: {
@@ -1067,10 +1067,10 @@ RID PhysicsJoint::_get_visual_instance_rid() const {
 void PhysicsJoint::_bind_methods() {
 
 	ClassDB::bind_method(D_METHOD("_get_visual_instance_rid"),&PhysicsJoint::_get_visual_instance_rid);
-	ClassDB::bind_method(D_METHOD("set_body_A","path"),&PhysicsJoint::set_body_A);
-	ClassDB::bind_method(D_METHOD("set_body_B"),&PhysicsJoint::set_body_B);
-	ClassDB::bind_method(D_METHOD("get_body_A","path"),&PhysicsJoint::get_body_A);
-	ClassDB::bind_method(D_METHOD("get_body_B"),&PhysicsJoint::get_body_B);
+	ClassDB::bind_method(D_METHOD("set_body_a","path"),&PhysicsJoint::set_body_a);
+	ClassDB::bind_method(D_METHOD("set_body_b"),&PhysicsJoint::set_body_b);
+	ClassDB::bind_method(D_METHOD("get_body_a","path"),&PhysicsJoint::get_body_a);
+	ClassDB::bind_method(D_METHOD("get_body_b"),&PhysicsJoint::get_body_b);
 
 	ClassDB::bind_method(D_METHOD("set_active","active"),&PhysicsJoint::set_active);
 	ClassDB::bind_method(D_METHOD("is_active"),&PhysicsJoint::is_active);
@@ -1085,14 +1085,14 @@ void PhysicsJoint::_bind_methods() {
 
 }
 
-void PhysicsJoint::set_body_A(const NodePath& p_path) {
+void PhysicsJoint::set_body_a(const NodePath& p_path) {
 
 	_disconnect();
 	body_A=p_path;
 	_connect();
 	_change_notify("body_A");
 }
-void PhysicsJoint::set_body_B(const NodePath& p_path) {
+void PhysicsJoint::set_body_b(const NodePath& p_path) {
 
 	_disconnect();
 	body_B=p_path;
@@ -1100,11 +1100,11 @@ void PhysicsJoint::set_body_B(const NodePath& p_path) {
 	_change_notify("body_B");
 
 }
-NodePath PhysicsJoint::get_body_A() const {
+NodePath PhysicsJoint::get_body_a() const {
 
 	return body_A;
 }
-NodePath PhysicsJoint::get_body_B() const {
+NodePath PhysicsJoint::get_body_b() const {
 
 	return body_B;
 }
diff --git a/scene/3d/physics_joint.h b/scene/3d/physics_joint.h
index 2b221e25f21..b834aaf6d2f 100644
--- a/scene/3d/physics_joint.h
+++ b/scene/3d/physics_joint.h
@@ -354,10 +354,10 @@ protected:
 	void _connect();
 public:
 
-	void set_body_A(const NodePath& p_path);
-	void set_body_B(const NodePath& p_path);
-	NodePath get_body_A() const;
-	NodePath get_body_B() const;
+	void set_body_a(const NodePath& p_path);
+	void set_body_b(const NodePath& p_path);
+	NodePath get_body_a() const;
+	NodePath get_body_b() const;
 
 	void set_active(bool p_active);
 	bool is_active() const;
diff --git a/scene/3d/remote_transform.cpp b/scene/3d/remote_transform.cpp
index 4dcfb5f94e8..492930ea9b7 100644
--- a/scene/3d/remote_transform.cpp
+++ b/scene/3d/remote_transform.cpp
@@ -39,7 +39,7 @@ void RemoteTransform::_update_cache() {
 			return;
 		}
 
-		cache = node->get_instance_ID();
+		cache = node->get_instance_id();
 	}
 }
 
diff --git a/scene/3d/skeleton.cpp b/scene/3d/skeleton.cpp
index 71af77c027d..ea5d21cd4e6 100644
--- a/scene/3d/skeleton.cpp
+++ b/scene/3d/skeleton.cpp
@@ -407,7 +407,7 @@ void Skeleton::bind_child_node_to_bone(int p_bone, Node *p_node) {
 	ERR_FAIL_NULL(p_node);
 	ERR_FAIL_INDEX(p_bone, bones.size());
 
-	uint32_t id = p_node->get_instance_ID();
+	uint32_t id = p_node->get_instance_id();
 
 	for (List<uint32_t>::Element *E = bones[p_bone].nodes_bound.front(); E; E = E->next()) {
 
@@ -422,7 +422,7 @@ void Skeleton::unbind_child_node_from_bone(int p_bone, Node *p_node) {
 	ERR_FAIL_NULL(p_node);
 	ERR_FAIL_INDEX(p_bone, bones.size());
 
-	uint32_t id = p_node->get_instance_ID();
+	uint32_t id = p_node->get_instance_id();
 	bones[p_bone].nodes_bound.erase(id);
 }
 void Skeleton::get_bound_child_nodes_to_bone(int p_bone, List<Node *> *p_bound) const {
diff --git a/scene/3d/visual_instance.cpp b/scene/3d/visual_instance.cpp
index 6f8c38eddde..1a294d016a7 100644
--- a/scene/3d/visual_instance.cpp
+++ b/scene/3d/visual_instance.cpp
@@ -149,7 +149,7 @@ void VisualInstance::set_base(const RID &p_base) {
 VisualInstance::VisualInstance() {
 
 	instance = VisualServer::get_singleton()->instance_create();
-	VisualServer::get_singleton()->instance_attach_object_instance_ID(instance, get_instance_ID());
+	VisualServer::get_singleton()->instance_attach_object_instance_id(instance, get_instance_id());
 	layers = 1;
 	set_notify_transform(true);
 }
diff --git a/scene/animation/animation_player.cpp b/scene/animation/animation_player.cpp
index 85a9ada38a0..7173a820b48 100644
--- a/scene/animation/animation_player.cpp
+++ b/scene/animation/animation_player.cpp
@@ -247,7 +247,7 @@ void AnimationPlayer::_generate_node_caches(AnimationData *p_anim) {
 			ERR_EXPLAIN("On Animation: '" + p_anim->name + "', couldn't resolve track:  '" + String(a->track_get_path(i)) + "'");
 		}
 		ERR_CONTINUE(!child); // couldn't find the child node
-		uint32_t id = resource.is_valid() ? resource->get_instance_ID() : child->get_instance_ID();
+		uint32_t id = resource.is_valid() ? resource->get_instance_id() : child->get_instance_id();
 		int bone_idx = -1;
 
 		if (a->track_get_path(i).get_property() && child->cast_to<Skeleton>()) {
diff --git a/scene/animation/animation_tree_player.cpp b/scene/animation/animation_tree_player.cpp
index 7c2684ba470..6a9c2587d5e 100644
--- a/scene/animation/animation_tree_player.cpp
+++ b/scene/animation/animation_tree_player.cpp
@@ -1481,7 +1481,7 @@ AnimationTreePlayer::Track *AnimationTreePlayer::_find_track(const NodePath &p_p
 		return NULL;
 	}
 
-	ObjectID id = child->get_instance_ID();
+	ObjectID id = child->get_instance_id();
 	StringName property;
 	int bone_idx = -1;
 
diff --git a/scene/animation/tween.cpp b/scene/animation/tween.cpp
index ad0b0fbfb2a..78d3357bb43 100644
--- a/scene/animation/tween.cpp
+++ b/scene/animation/tween.cpp
@@ -1024,7 +1024,7 @@ bool Tween::interpolate_property(Object *p_object, String p_property, Variant p_
 	data.finish = false;
 	data.elapsed = 0;
 
-	data.id = p_object->get_instance_ID();
+	data.id = p_object->get_instance_id();
 	data.key = p_property;
 	data.initial_val = p_initial_val;
 	data.final_val = p_final_val;
@@ -1066,7 +1066,7 @@ bool Tween::interpolate_method(Object *p_object, String p_method, Variant p_init
 	data.finish = false;
 	data.elapsed = 0;
 
-	data.id = p_object->get_instance_ID();
+	data.id = p_object->get_instance_id();
 	data.key = p_method;
 	data.initial_val = p_initial_val;
 	data.final_val = p_final_val;
@@ -1103,7 +1103,7 @@ bool Tween::interpolate_callback(Object *p_object, real_t p_duration, String p_c
 	data.call_deferred = false;
 	data.elapsed = 0;
 
-	data.id = p_object->get_instance_ID();
+	data.id = p_object->get_instance_id();
 	data.key = p_callback;
 	data.duration = p_duration;
 	data.delay = 0;
@@ -1155,7 +1155,7 @@ bool Tween::interpolate_deferred_callback(Object *p_object, real_t p_duration, S
 	data.call_deferred = true;
 	data.elapsed = 0;
 
-	data.id = p_object->get_instance_ID();
+	data.id = p_object->get_instance_id();
 	data.key = p_callback;
 	data.duration = p_duration;
 	data.delay = 0;
@@ -1222,10 +1222,10 @@ bool Tween::follow_property(Object *p_object, String p_property, Variant p_initi
 	data.finish = false;
 	data.elapsed = 0;
 
-	data.id = p_object->get_instance_ID();
+	data.id = p_object->get_instance_id();
 	data.key = p_property;
 	data.initial_val = p_initial_val;
-	data.target_id = p_target->get_instance_ID();
+	data.target_id = p_target->get_instance_id();
 	data.target_key = p_target_property;
 	data.duration = p_duration;
 	data.trans_type = p_trans_type;
@@ -1272,10 +1272,10 @@ bool Tween::follow_method(Object *p_object, String p_method, Variant p_initial_v
 	data.finish = false;
 	data.elapsed = 0;
 
-	data.id = p_object->get_instance_ID();
+	data.id = p_object->get_instance_id();
 	data.key = p_method;
 	data.initial_val = p_initial_val;
-	data.target_id = p_target->get_instance_ID();
+	data.target_id = p_target->get_instance_id();
 	data.target_key = p_target_method;
 	data.duration = p_duration;
 	data.trans_type = p_trans_type;
@@ -1321,9 +1321,9 @@ bool Tween::targeting_property(Object *p_object, String p_property, Object *p_in
 	data.finish = false;
 	data.elapsed = 0;
 
-	data.id = p_object->get_instance_ID();
+	data.id = p_object->get_instance_id();
 	data.key = p_property;
-	data.target_id = p_initial->get_instance_ID();
+	data.target_id = p_initial->get_instance_id();
 	data.target_key = p_initial_property;
 	data.initial_val = initial_val;
 	data.final_val = p_final_val;
@@ -1375,9 +1375,9 @@ bool Tween::targeting_method(Object *p_object, String p_method, Object *p_initia
 	data.finish = false;
 	data.elapsed = 0;
 
-	data.id = p_object->get_instance_ID();
+	data.id = p_object->get_instance_id();
 	data.key = p_method;
-	data.target_id = p_initial->get_instance_ID();
+	data.target_id = p_initial->get_instance_id();
 	data.target_key = p_initial_method;
 	data.initial_val = initial_val;
 	data.final_val = p_final_val;
diff --git a/scene/gui/control.cpp b/scene/gui/control.cpp
index ca81b72e89e..339b4e079ec 100644
--- a/scene/gui/control.cpp
+++ b/scene/gui/control.cpp
@@ -603,7 +603,7 @@ bool Control::has_point(const Point2 &p_point) const {
 void Control::set_drag_forwarding(Control *p_target) {
 
 	if (p_target)
-		data.drag_owner = p_target->get_instance_ID();
+		data.drag_owner = p_target->get_instance_id();
 	else
 		data.drag_owner = 0;
 }
diff --git a/scene/gui/option_button.cpp b/scene/gui/option_button.cpp
index b842419eabb..60874edf387 100644
--- a/scene/gui/option_button.cpp
+++ b/scene/gui/option_button.cpp
@@ -82,7 +82,7 @@ void OptionButton::_selected(int p_which) {
 	int selid = -1;
 	for (int i = 0; i < popup->get_item_count(); i++) {
 
-		bool is_clicked = popup->get_item_ID(i) == p_which;
+		bool is_clicked = popup->get_item_id(i) == p_which;
 		if (is_clicked) {
 			selid = i;
 			break;
@@ -129,9 +129,9 @@ void OptionButton::set_item_icon(int p_idx, const Ref<Texture> &p_icon) {
 
 	popup->set_item_icon(p_idx, p_icon);
 }
-void OptionButton::set_item_ID(int p_idx, int p_ID) {
+void OptionButton::set_item_id(int p_idx, int p_ID) {
 
-	popup->set_item_ID(p_idx, p_ID);
+	popup->set_item_id(p_idx, p_ID);
 }
 
 void OptionButton::set_item_metadata(int p_idx, const Variant &p_metadata) {
@@ -154,9 +154,9 @@ Ref<Texture> OptionButton::get_item_icon(int p_idx) const {
 	return popup->get_item_icon(p_idx);
 }
 
-int OptionButton::get_item_ID(int p_idx) const {
+int OptionButton::get_item_id(int p_idx) const {
 
-	return popup->get_item_ID(p_idx);
+	return popup->get_item_id(p_idx);
 }
 Variant OptionButton::get_item_metadata(int p_idx) const {
 
@@ -224,12 +224,12 @@ int OptionButton::get_selected() const {
 	return current;
 }
 
-int OptionButton::get_selected_ID() const {
+int OptionButton::get_selected_id() const {
 
 	int idx = get_selected();
 	if (idx < 0)
 		return 0;
-	return get_item_ID(current);
+	return get_item_id(current);
 }
 Variant OptionButton::get_selected_metadata() const {
 
@@ -252,7 +252,7 @@ Array OptionButton::_get_items() const {
 		items.push_back(get_item_text(i));
 		items.push_back(get_item_icon(i));
 		items.push_back(is_item_disabled(i));
-		items.push_back(get_item_ID(i));
+		items.push_back(get_item_id(i));
 		items.push_back(get_item_metadata(i));
 	}
 
@@ -293,11 +293,11 @@ void OptionButton::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_item_text", "idx", "text"), &OptionButton::set_item_text);
 	ClassDB::bind_method(D_METHOD("set_item_icon", "idx", "texture:Texture"), &OptionButton::set_item_icon);
 	ClassDB::bind_method(D_METHOD("set_item_disabled", "idx", "disabled"), &OptionButton::set_item_disabled);
-	ClassDB::bind_method(D_METHOD("set_item_ID", "idx", "id"), &OptionButton::set_item_ID);
+	ClassDB::bind_method(D_METHOD("set_item_id", "idx", "id"), &OptionButton::set_item_id);
 	ClassDB::bind_method(D_METHOD("set_item_metadata", "idx", "metadata"), &OptionButton::set_item_metadata);
 	ClassDB::bind_method(D_METHOD("get_item_text", "idx"), &OptionButton::get_item_text);
 	ClassDB::bind_method(D_METHOD("get_item_icon:Texture", "idx"), &OptionButton::get_item_icon);
-	ClassDB::bind_method(D_METHOD("get_item_ID", "idx"), &OptionButton::get_item_ID);
+	ClassDB::bind_method(D_METHOD("get_item_id", "idx"), &OptionButton::get_item_id);
 	ClassDB::bind_method(D_METHOD("get_item_metadata:Variant", "idx"), &OptionButton::get_item_metadata);
 	ClassDB::bind_method(D_METHOD("is_item_disabled", "idx"), &OptionButton::is_item_disabled);
 	ClassDB::bind_method(D_METHOD("get_item_count"), &OptionButton::get_item_count);
@@ -305,7 +305,7 @@ void OptionButton::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("clear"), &OptionButton::clear);
 	ClassDB::bind_method(D_METHOD("select", "idx"), &OptionButton::select);
 	ClassDB::bind_method(D_METHOD("get_selected"), &OptionButton::get_selected);
-	ClassDB::bind_method(D_METHOD("get_selected_ID"), &OptionButton::get_selected_ID);
+	ClassDB::bind_method(D_METHOD("get_selected_id"), &OptionButton::get_selected_id);
 	ClassDB::bind_method(D_METHOD("get_selected_metadata:Variant"), &OptionButton::get_selected_metadata);
 	ClassDB::bind_method(D_METHOD("remove_item", "idx"), &OptionButton::remove_item);
 	ClassDB::bind_method(D_METHOD("_select_int"), &OptionButton::_select_int);
diff --git a/scene/gui/option_button.h b/scene/gui/option_button.h
index 887d199c901..db921b8b977 100644
--- a/scene/gui/option_button.h
+++ b/scene/gui/option_button.h
@@ -62,13 +62,13 @@ public:
 
 	void set_item_text(int p_idx, const String &p_text);
 	void set_item_icon(int p_idx, const Ref<Texture> &p_icon);
-	void set_item_ID(int p_idx, int p_ID);
+	void set_item_id(int p_idx, int p_ID);
 	void set_item_metadata(int p_idx, const Variant &p_metadata);
 	void set_item_disabled(int p_idx, bool p_disabled);
 
 	String get_item_text(int p_idx) const;
 	Ref<Texture> get_item_icon(int p_idx) const;
-	int get_item_ID(int p_idx) const;
+	int get_item_id(int p_idx) const;
 	Variant get_item_metadata(int p_idx) const;
 	bool is_item_disabled(int p_idx) const;
 
@@ -80,7 +80,7 @@ public:
 
 	void select(int p_idx);
 	int get_selected() const;
-	int get_selected_ID() const;
+	int get_selected_id() const;
 	Variant get_selected_metadata() const;
 
 	void remove_item(int p_idx);
diff --git a/scene/gui/popup_menu.cpp b/scene/gui/popup_menu.cpp
index b673f9d68a6..e3f9a09db3d 100644
--- a/scene/gui/popup_menu.cpp
+++ b/scene/gui/popup_menu.cpp
@@ -647,7 +647,7 @@ void PopupMenu::set_item_checked(int p_idx, bool p_checked) {
 
 	update();
 }
-void PopupMenu::set_item_ID(int p_idx, int p_ID) {
+void PopupMenu::set_item_id(int p_idx, int p_ID) {
 
 	ERR_FAIL_INDEX(p_idx, items.size());
 	items[p_idx].ID = p_ID;
@@ -737,7 +737,7 @@ bool PopupMenu::is_item_checked(int p_idx) const {
 	return items[p_idx].checked;
 }
 
-int PopupMenu::get_item_ID(int p_idx) const {
+int PopupMenu::get_item_id(int p_idx) const {
 
 	ERR_FAIL_INDEX_V(p_idx, items.size(), 0);
 	return items[p_idx].ID;
@@ -956,7 +956,7 @@ Array PopupMenu::_get_items() const {
 		items.push_back(is_item_checked(i));
 		items.push_back(is_item_disabled(i));
 
-		items.push_back(get_item_ID(i));
+		items.push_back(get_item_id(i));
 		items.push_back(get_item_accelerator(i));
 		items.push_back(get_item_metadata(i));
 		items.push_back(get_item_submenu(i));
@@ -1011,7 +1011,7 @@ void PopupMenu::_set_items(const Array &p_items) {
 		set_item_as_checkable(idx, checkable);
 		set_item_checked(idx, checked);
 		set_item_disabled(idx, disabled);
-		set_item_ID(idx, id);
+		set_item_id(idx, id);
 		set_item_metadata(idx, meta);
 		set_item_as_separator(idx, sep);
 		set_item_accelerator(idx, accel);
@@ -1089,7 +1089,7 @@ void PopupMenu::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_item_text", "idx", "text"), &PopupMenu::set_item_text);
 	ClassDB::bind_method(D_METHOD("set_item_icon", "idx", "icon:Texture"), &PopupMenu::set_item_icon);
 	ClassDB::bind_method(D_METHOD("set_item_checked", "idx", "checked"), &PopupMenu::set_item_checked);
-	ClassDB::bind_method(D_METHOD("set_item_ID", "idx", "id"), &PopupMenu::set_item_ID);
+	ClassDB::bind_method(D_METHOD("set_item_id", "idx", "id"), &PopupMenu::set_item_id);
 	ClassDB::bind_method(D_METHOD("set_item_accelerator", "idx", "accel"), &PopupMenu::set_item_accelerator);
 	ClassDB::bind_method(D_METHOD("set_item_metadata", "idx", "metadata"), &PopupMenu::set_item_metadata);
 	ClassDB::bind_method(D_METHOD("set_item_disabled", "idx", "disabled"), &PopupMenu::set_item_disabled);
@@ -1104,7 +1104,7 @@ void PopupMenu::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_item_text", "idx"), &PopupMenu::get_item_text);
 	ClassDB::bind_method(D_METHOD("get_item_icon:Texture", "idx"), &PopupMenu::get_item_icon);
 	ClassDB::bind_method(D_METHOD("is_item_checked", "idx"), &PopupMenu::is_item_checked);
-	ClassDB::bind_method(D_METHOD("get_item_ID", "idx"), &PopupMenu::get_item_ID);
+	ClassDB::bind_method(D_METHOD("get_item_id", "idx"), &PopupMenu::get_item_id);
 	ClassDB::bind_method(D_METHOD("get_item_index", "id"), &PopupMenu::get_item_index);
 	ClassDB::bind_method(D_METHOD("get_item_accelerator", "idx"), &PopupMenu::get_item_accelerator);
 	ClassDB::bind_method(D_METHOD("get_item_metadata:Variant", "idx"), &PopupMenu::get_item_metadata);
diff --git a/scene/gui/popup_menu.h b/scene/gui/popup_menu.h
index 6f1a2db3639..cbfe7873e68 100644
--- a/scene/gui/popup_menu.h
+++ b/scene/gui/popup_menu.h
@@ -118,7 +118,7 @@ public:
 	void set_item_text(int p_idx, const String &p_text);
 	void set_item_icon(int p_idx, const Ref<Texture> &p_icon);
 	void set_item_checked(int p_idx, bool p_checked);
-	void set_item_ID(int p_idx, int p_ID);
+	void set_item_id(int p_idx, int p_ID);
 	void set_item_accelerator(int p_idx, uint32_t p_accel);
 	void set_item_metadata(int p_idx, const Variant &p_meta);
 	void set_item_disabled(int p_idx, bool p_disabled);
@@ -135,7 +135,7 @@ public:
 	int get_item_idx_from_text(const String &text) const;
 	Ref<Texture> get_item_icon(int p_idx) const;
 	bool is_item_checked(int p_idx) const;
-	int get_item_ID(int p_idx) const;
+	int get_item_id(int p_idx) const;
 	int get_item_index(int p_ID) const;
 	uint32_t get_item_accelerator(int p_idx) const;
 	Variant get_item_metadata(int p_idx) const;
diff --git a/scene/gui/tree.cpp b/scene/gui/tree.cpp
index 9499ba9dcd9..0ce29b7472e 100644
--- a/scene/gui/tree.cpp
+++ b/scene/gui/tree.cpp
@@ -291,7 +291,7 @@ void TreeItem::set_custom_draw(int p_column, Object *p_object, const StringName
 	ERR_FAIL_INDEX(p_column, cells.size());
 	ERR_FAIL_NULL(p_object);
 
-	cells[p_column].custom_draw_obj = p_object->get_instance_ID();
+	cells[p_column].custom_draw_obj = p_object->get_instance_id();
 	cells[p_column].custom_draw_callback = p_callback;
 }
 
diff --git a/scene/main/canvas_layer.cpp b/scene/main/canvas_layer.cpp
index 150aee99ba3..0ee57bd7940 100644
--- a/scene/main/canvas_layer.cpp
+++ b/scene/main/canvas_layer.cpp
@@ -204,7 +204,7 @@ void CanvasLayer::set_custom_viewport(Node *p_viewport) {
 	custom_viewport = p_viewport->cast_to<Viewport>();
 
 	if (custom_viewport) {
-		custom_viewport_id = custom_viewport->get_instance_ID();
+		custom_viewport_id = custom_viewport->get_instance_id();
 	} else {
 		custom_viewport_id = 0;
 	}
diff --git a/scene/main/node.cpp b/scene/main/node.cpp
index c3849f79dfa..aca15c27bf4 100755
--- a/scene/main/node.cpp
+++ b/scene/main/node.cpp
@@ -77,11 +77,11 @@ void Node::_notification(int p_notification) {
 			}
 
 			if (data.input)
-				add_to_group("_vp_input" + itos(get_viewport()->get_instance_ID()));
+				add_to_group("_vp_input" + itos(get_viewport()->get_instance_id()));
 			if (data.unhandled_input)
-				add_to_group("_vp_unhandled_input" + itos(get_viewport()->get_instance_ID()));
+				add_to_group("_vp_unhandled_input" + itos(get_viewport()->get_instance_id()));
 			if (data.unhandled_key_input)
-				add_to_group("_vp_unhandled_key_input" + itos(get_viewport()->get_instance_ID()));
+				add_to_group("_vp_unhandled_key_input" + itos(get_viewport()->get_instance_id()));
 
 			get_tree()->node_count++;
 
@@ -90,11 +90,11 @@ void Node::_notification(int p_notification) {
 
 			get_tree()->node_count--;
 			if (data.input)
-				remove_from_group("_vp_input" + itos(get_viewport()->get_instance_ID()));
+				remove_from_group("_vp_input" + itos(get_viewport()->get_instance_id()));
 			if (data.unhandled_input)
-				remove_from_group("_vp_unhandled_input" + itos(get_viewport()->get_instance_ID()));
+				remove_from_group("_vp_unhandled_input" + itos(get_viewport()->get_instance_id()));
 			if (data.unhandled_key_input)
-				remove_from_group("_vp_unhandled_key_input" + itos(get_viewport()->get_instance_ID()));
+				remove_from_group("_vp_unhandled_key_input" + itos(get_viewport()->get_instance_id()));
 
 			data.pause_owner = NULL;
 			if (data.path_cache) {
@@ -1115,9 +1115,9 @@ void Node::set_process_input(bool p_enable) {
 		return;
 
 	if (p_enable)
-		add_to_group("_vp_input" + itos(get_viewport()->get_instance_ID()));
+		add_to_group("_vp_input" + itos(get_viewport()->get_instance_id()));
 	else
-		remove_from_group("_vp_input" + itos(get_viewport()->get_instance_ID()));
+		remove_from_group("_vp_input" + itos(get_viewport()->get_instance_id()));
 }
 
 bool Node::is_processing_input() const {
@@ -1133,9 +1133,9 @@ void Node::set_process_unhandled_input(bool p_enable) {
 		return;
 
 	if (p_enable)
-		add_to_group("_vp_unhandled_input" + itos(get_viewport()->get_instance_ID()));
+		add_to_group("_vp_unhandled_input" + itos(get_viewport()->get_instance_id()));
 	else
-		remove_from_group("_vp_unhandled_input" + itos(get_viewport()->get_instance_ID()));
+		remove_from_group("_vp_unhandled_input" + itos(get_viewport()->get_instance_id()));
 }
 
 bool Node::is_processing_unhandled_input() const {
@@ -1151,9 +1151,9 @@ void Node::set_process_unhandled_key_input(bool p_enable) {
 		return;
 
 	if (p_enable)
-		add_to_group("_vp_unhandled_key_input" + itos(get_viewport()->get_instance_ID()));
+		add_to_group("_vp_unhandled_key_input" + itos(get_viewport()->get_instance_id()));
 	else
-		remove_from_group("_vp_unhandled_key_input" + itos(get_viewport()->get_instance_ID()));
+		remove_from_group("_vp_unhandled_key_input" + itos(get_viewport()->get_instance_id()));
 }
 
 bool Node::is_processing_unhandled_key_input() const {
@@ -2606,7 +2606,7 @@ static void _Node_debug_sn(Object *p_obj) {
 		path = n->get_name();
 	else
 		path = String(p->get_name()) + "/" + p->get_path_to(n);
-	print_line(itos(p_obj->get_instance_ID()) + "- Stray Node: " + path + " (Type: " + n->get_class() + ")");
+	print_line(itos(p_obj->get_instance_id()) + "- Stray Node: " + path + " (Type: " + n->get_class() + ")");
 }
 
 void Node::_print_stray_nodes() {
diff --git a/scene/main/scene_tree.cpp b/scene/main/scene_tree.cpp
index 48e6a447453..6aa2c839417 100644
--- a/scene/main/scene_tree.cpp
+++ b/scene/main/scene_tree.cpp
@@ -1106,7 +1106,7 @@ static void _fill_array(Node *p_node, Array &array, int p_level) {
 	array.push_back(p_level);
 	array.push_back(p_node->get_name());
 	array.push_back(p_node->get_class());
-	array.push_back(p_node->get_instance_ID());
+	array.push_back(p_node->get_instance_id());
 	for (int i = 0; i < p_node->get_child_count(); i++) {
 
 		_fill_array(p_node->get_child(i), array, p_level + 1);
@@ -1141,7 +1141,7 @@ void SceneTree::queue_delete(Object *p_object) {
 	_THREAD_SAFE_METHOD_
 	ERR_FAIL_NULL(p_object);
 	p_object->_is_queued_for_deletion = true;
-	delete_queue.push_back(p_object->get_instance_ID());
+	delete_queue.push_back(p_object->get_instance_id());
 }
 
 int SceneTree::get_node_count() const {
diff --git a/scene/main/viewport.cpp b/scene/main/viewport.cpp
index 76b281ebac7..e3c136a33fd 100644
--- a/scene/main/viewport.cpp
+++ b/scene/main/viewport.cpp
@@ -2303,7 +2303,7 @@ List<Control *>::Element *Viewport::_gui_show_modal(Control *p_control) {
 
 	gui.modal_stack.push_back(p_control);
 	if (gui.key_focus)
-		p_control->_modal_set_prev_focus_owner(gui.key_focus->get_instance_ID());
+		p_control->_modal_set_prev_focus_owner(gui.key_focus->get_instance_id());
 	else
 		p_control->_modal_set_prev_focus_owner(0);
 
@@ -2769,7 +2769,7 @@ Viewport::Viewport() {
 	set_shadow_atlas_quadrant_subdiv(2, SHADOW_ATLAS_QUADRANT_SUBDIV_16);
 	set_shadow_atlas_quadrant_subdiv(3, SHADOW_ATLAS_QUADRANT_SUBDIV_64);
 
-	String id = itos(get_instance_ID());
+	String id = itos(get_instance_id());
 	input_group = "_vp_input" + id;
 	gui_input_group = "_vp_gui_input" + id;
 	unhandled_input_group = "_vp_unhandled_input" + id;
diff --git a/servers/physics/joints/pin_joint_sw.h b/servers/physics/joints/pin_joint_sw.h
index 644c2040661..1d580b6c216 100644
--- a/servers/physics/joints/pin_joint_sw.h
+++ b/servers/physics/joints/pin_joint_sw.h
@@ -83,11 +83,11 @@ public:
 	void set_param(PhysicsServer::PinJointParam p_param, real_t p_value);
 	real_t get_param(PhysicsServer::PinJointParam p_param) const;
 
-	void set_pos_A(const Vector3 &p_pos) { m_pivotInA = p_pos; }
-	void set_pos_B(const Vector3 &p_pos) { m_pivotInB = p_pos; }
+	void set_pos_a(const Vector3 &p_pos) { m_pivotInA = p_pos; }
+	void set_pos_b(const Vector3 &p_pos) { m_pivotInB = p_pos; }
 
-	Vector3 get_pos_A() { return m_pivotInB; }
-	Vector3 get_pos_B() { return m_pivotInA; }
+	Vector3 get_pos_a() { return m_pivotInB; }
+	Vector3 get_pos_b() { return m_pivotInA; }
 
 	PinJointSW(BodySW *p_body_a, const Vector3 &p_pos_a, BodySW *p_body_b, const Vector3 &p_pos_b);
 	~PinJointSW();
diff --git a/servers/physics/physics_server_sw.cpp b/servers/physics/physics_server_sw.cpp
index 833c77216e3..c40503c426c 100644
--- a/servers/physics/physics_server_sw.cpp
+++ b/servers/physics/physics_server_sw.cpp
@@ -350,7 +350,7 @@ void PhysicsServerSW::area_set_shape_disabled(RID p_area, int p_shape_idx, bool
 	area->set_shape_as_disabled(p_shape_idx, p_disabled);
 }
 
-void PhysicsServerSW::area_attach_object_instance_ID(RID p_area, ObjectID p_ID) {
+void PhysicsServerSW::area_attach_object_instance_id(RID p_area, ObjectID p_ID) {
 
 	if (space_owner.owns(p_area)) {
 		SpaceSW *space = space_owner.get(p_area);
@@ -360,7 +360,7 @@ void PhysicsServerSW::area_attach_object_instance_ID(RID p_area, ObjectID p_ID)
 	ERR_FAIL_COND(!area);
 	area->set_instance_id(p_ID);
 }
-ObjectID PhysicsServerSW::area_get_object_instance_ID(RID p_area) const {
+ObjectID PhysicsServerSW::area_get_object_instance_id(RID p_area) const {
 
 	if (space_owner.owns(p_area)) {
 		SpaceSW *space = space_owner.get(p_area);
@@ -438,7 +438,7 @@ void PhysicsServerSW::area_set_monitor_callback(RID p_area, Object *p_receiver,
 	AreaSW *area = area_owner.get(p_area);
 	ERR_FAIL_COND(!area);
 
-	area->set_monitor_callback(p_receiver ? p_receiver->get_instance_ID() : 0, p_method);
+	area->set_monitor_callback(p_receiver ? p_receiver->get_instance_id() : 0, p_method);
 }
 
 void PhysicsServerSW::area_set_ray_pickable(RID p_area, bool p_enable) {
@@ -462,7 +462,7 @@ void PhysicsServerSW::area_set_area_monitor_callback(RID p_area, Object *p_recei
 	AreaSW *area = area_owner.get(p_area);
 	ERR_FAIL_COND(!area);
 
-	area->set_area_monitor_callback(p_receiver ? p_receiver->get_instance_ID() : 0, p_method);
+	area->set_area_monitor_callback(p_receiver ? p_receiver->get_instance_id() : 0, p_method);
 }
 
 /* BODY API */
@@ -662,7 +662,7 @@ uint32_t PhysicsServerSW::body_get_collision_mask(RID p_body) const {
 	return body->get_collision_mask();
 }
 
-void PhysicsServerSW::body_attach_object_instance_ID(RID p_body, uint32_t p_ID) {
+void PhysicsServerSW::body_attach_object_instance_id(RID p_body, uint32_t p_ID) {
 
 	BodySW *body = body_owner.get(p_body);
 	ERR_FAIL_COND(!body);
@@ -670,7 +670,7 @@ void PhysicsServerSW::body_attach_object_instance_ID(RID p_body, uint32_t p_ID)
 	body->set_instance_id(p_ID);
 };
 
-uint32_t PhysicsServerSW::body_get_object_instance_ID(RID p_body) const {
+uint32_t PhysicsServerSW::body_get_object_instance_id(RID p_body) const {
 
 	BodySW *body = body_owner.get(p_body);
 	ERR_FAIL_COND_V(!body, 0);
@@ -877,7 +877,7 @@ void PhysicsServerSW::body_set_force_integration_callback(RID p_body, Object *p_
 
 	BodySW *body = body_owner.get(p_body);
 	ERR_FAIL_COND(!body);
-	body->set_force_integration_callback(p_receiver ? p_receiver->get_instance_ID() : ObjectID(0), p_method, p_udata);
+	body->set_force_integration_callback(p_receiver ? p_receiver->get_instance_id() : ObjectID(0), p_method, p_udata);
 }
 
 void PhysicsServerSW::body_set_ray_pickable(RID p_body, bool p_enable) {
@@ -944,38 +944,38 @@ real_t PhysicsServerSW::pin_joint_get_param(RID p_joint, PinJointParam p_param)
 	return pin_joint->get_param(p_param);
 }
 
-void PhysicsServerSW::pin_joint_set_local_A(RID p_joint, const Vector3 &p_A) {
+void PhysicsServerSW::pin_joint_set_local_a(RID p_joint, const Vector3 &p_A) {
 
 	JointSW *joint = joint_owner.get(p_joint);
 	ERR_FAIL_COND(!joint);
 	ERR_FAIL_COND(joint->get_type() != JOINT_PIN);
 	PinJointSW *pin_joint = static_cast<PinJointSW *>(joint);
-	pin_joint->set_pos_A(p_A);
+	pin_joint->set_pos_a(p_A);
 }
-Vector3 PhysicsServerSW::pin_joint_get_local_A(RID p_joint) const {
+Vector3 PhysicsServerSW::pin_joint_get_local_a(RID p_joint) const {
 
 	JointSW *joint = joint_owner.get(p_joint);
 	ERR_FAIL_COND_V(!joint, Vector3());
 	ERR_FAIL_COND_V(joint->get_type() != JOINT_PIN, Vector3());
 	PinJointSW *pin_joint = static_cast<PinJointSW *>(joint);
-	return pin_joint->get_pos_A();
+	return pin_joint->get_pos_a();
 }
 
-void PhysicsServerSW::pin_joint_set_local_B(RID p_joint, const Vector3 &p_B) {
+void PhysicsServerSW::pin_joint_set_local_b(RID p_joint, const Vector3 &p_B) {
 
 	JointSW *joint = joint_owner.get(p_joint);
 	ERR_FAIL_COND(!joint);
 	ERR_FAIL_COND(joint->get_type() != JOINT_PIN);
 	PinJointSW *pin_joint = static_cast<PinJointSW *>(joint);
-	pin_joint->set_pos_B(p_B);
+	pin_joint->set_pos_b(p_B);
 }
-Vector3 PhysicsServerSW::pin_joint_get_local_B(RID p_joint) const {
+Vector3 PhysicsServerSW::pin_joint_get_local_b(RID p_joint) const {
 
 	JointSW *joint = joint_owner.get(p_joint);
 	ERR_FAIL_COND_V(!joint, Vector3());
 	ERR_FAIL_COND_V(joint->get_type() != JOINT_PIN, Vector3());
 	PinJointSW *pin_joint = static_cast<PinJointSW *>(joint);
-	return pin_joint->get_pos_B();
+	return pin_joint->get_pos_b();
 }
 
 RID PhysicsServerSW::joint_create_hinge(RID p_body_A, const Transform &p_frame_A, RID p_body_B, const Transform &p_frame_B) {
diff --git a/servers/physics/physics_server_sw.h b/servers/physics/physics_server_sw.h
index 591fe4af46d..bae2839b714 100644
--- a/servers/physics/physics_server_sw.h
+++ b/servers/physics/physics_server_sw.h
@@ -121,8 +121,8 @@ public:
 
 	virtual void area_set_shape_disabled(RID p_area, int p_shape_idx, bool p_disabled);
 
-	virtual void area_attach_object_instance_ID(RID p_area, ObjectID p_ID);
-	virtual ObjectID area_get_object_instance_ID(RID p_area) const;
+	virtual void area_attach_object_instance_id(RID p_area, ObjectID p_ID);
+	virtual ObjectID area_get_object_instance_id(RID p_area) const;
 
 	virtual void area_set_param(RID p_area, AreaParameter p_param, const Variant &p_value);
 	virtual void area_set_transform(RID p_area, const Transform &p_transform);
@@ -165,8 +165,8 @@ public:
 	virtual void body_remove_shape(RID p_body, int p_shape_idx);
 	virtual void body_clear_shapes(RID p_body);
 
-	virtual void body_attach_object_instance_ID(RID p_body, uint32_t p_ID);
-	virtual uint32_t body_get_object_instance_ID(RID p_body) const;
+	virtual void body_attach_object_instance_id(RID p_body, uint32_t p_ID);
+	virtual uint32_t body_get_object_instance_id(RID p_body) const;
 
 	virtual void body_set_enable_continuous_collision_detection(RID p_body, bool p_enable);
 	virtual bool body_is_continuous_collision_detection_enabled(RID p_body) const;
@@ -226,11 +226,11 @@ public:
 	virtual void pin_joint_set_param(RID p_joint, PinJointParam p_param, real_t p_value);
 	virtual real_t pin_joint_get_param(RID p_joint, PinJointParam p_param) const;
 
-	virtual void pin_joint_set_local_A(RID p_joint, const Vector3 &p_A);
-	virtual Vector3 pin_joint_get_local_A(RID p_joint) const;
+	virtual void pin_joint_set_local_a(RID p_joint, const Vector3 &p_A);
+	virtual Vector3 pin_joint_get_local_a(RID p_joint) const;
 
-	virtual void pin_joint_set_local_B(RID p_joint, const Vector3 &p_B);
-	virtual Vector3 pin_joint_get_local_B(RID p_joint) const;
+	virtual void pin_joint_set_local_b(RID p_joint, const Vector3 &p_B);
+	virtual Vector3 pin_joint_get_local_b(RID p_joint) const;
 
 	virtual RID joint_create_hinge(RID p_body_A, const Transform &p_frame_A, RID p_body_B, const Transform &p_frame_B);
 	virtual RID joint_create_hinge_simple(RID p_body_A, const Vector3 &p_pivot_A, const Vector3 &p_axis_A, RID p_body_B, const Vector3 &p_pivot_B, const Vector3 &p_axis_B);
diff --git a/servers/physics_2d/physics_2d_server_sw.cpp b/servers/physics_2d/physics_2d_server_sw.cpp
index add376bfb20..debd38d43a2 100644
--- a/servers/physics_2d/physics_2d_server_sw.cpp
+++ b/servers/physics_2d/physics_2d_server_sw.cpp
@@ -415,7 +415,7 @@ void Physics2DServerSW::area_clear_shapes(RID p_area) {
 		area->remove_shape(0);
 }
 
-void Physics2DServerSW::area_attach_object_instance_ID(RID p_area, ObjectID p_ID) {
+void Physics2DServerSW::area_attach_object_instance_id(RID p_area, ObjectID p_ID) {
 
 	if (space_owner.owns(p_area)) {
 		Space2DSW *space = space_owner.get(p_area);
@@ -425,7 +425,7 @@ void Physics2DServerSW::area_attach_object_instance_ID(RID p_area, ObjectID p_ID
 	ERR_FAIL_COND(!area);
 	area->set_instance_id(p_ID);
 }
-ObjectID Physics2DServerSW::area_get_object_instance_ID(RID p_area) const {
+ObjectID Physics2DServerSW::area_get_object_instance_id(RID p_area) const {
 
 	if (space_owner.owns(p_area)) {
 		Space2DSW *space = space_owner.get(p_area);
@@ -510,7 +510,7 @@ void Physics2DServerSW::area_set_monitor_callback(RID p_area, Object *p_receiver
 	Area2DSW *area = area_owner.get(p_area);
 	ERR_FAIL_COND(!area);
 
-	area->set_monitor_callback(p_receiver ? p_receiver->get_instance_ID() : 0, p_method);
+	area->set_monitor_callback(p_receiver ? p_receiver->get_instance_id() : 0, p_method);
 }
 
 void Physics2DServerSW::area_set_area_monitor_callback(RID p_area, Object *p_receiver, const StringName &p_method) {
@@ -518,7 +518,7 @@ void Physics2DServerSW::area_set_area_monitor_callback(RID p_area, Object *p_rec
 	Area2DSW *area = area_owner.get(p_area);
 	ERR_FAIL_COND(!area);
 
-	area->set_area_monitor_callback(p_receiver ? p_receiver->get_instance_ID() : 0, p_method);
+	area->set_area_monitor_callback(p_receiver ? p_receiver->get_instance_id() : 0, p_method);
 }
 
 /* BODY API */
@@ -706,7 +706,7 @@ Physics2DServerSW::CCDMode Physics2DServerSW::body_get_continuous_collision_dete
 	return body->get_continuous_collision_detection_mode();
 }
 
-void Physics2DServerSW::body_attach_object_instance_ID(RID p_body, uint32_t p_ID) {
+void Physics2DServerSW::body_attach_object_instance_id(RID p_body, uint32_t p_ID) {
 
 	Body2DSW *body = body_owner.get(p_body);
 	ERR_FAIL_COND(!body);
@@ -714,7 +714,7 @@ void Physics2DServerSW::body_attach_object_instance_ID(RID p_body, uint32_t p_ID
 	body->set_instance_id(p_ID);
 };
 
-uint32_t Physics2DServerSW::body_get_object_instance_ID(RID p_body) const {
+uint32_t Physics2DServerSW::body_get_object_instance_id(RID p_body) const {
 
 	Body2DSW *body = body_owner.get(p_body);
 	ERR_FAIL_COND_V(!body, 0);
@@ -922,7 +922,7 @@ void Physics2DServerSW::body_set_force_integration_callback(RID p_body, Object *
 
 	Body2DSW *body = body_owner.get(p_body);
 	ERR_FAIL_COND(!body);
-	body->set_force_integration_callback(p_receiver ? p_receiver->get_instance_ID() : ObjectID(0), p_method, p_udata);
+	body->set_force_integration_callback(p_receiver ? p_receiver->get_instance_id() : ObjectID(0), p_method, p_udata);
 }
 
 bool Physics2DServerSW::body_collide_shape(RID p_body, int p_body_shape, RID p_shape, const Transform2D &p_shape_xform, const Vector2 &p_motion, Vector2 *r_results, int p_result_max, int &r_result_count) {
diff --git a/servers/physics_2d/physics_2d_server_sw.h b/servers/physics_2d/physics_2d_server_sw.h
index da72784b6fe..830ba91c98b 100644
--- a/servers/physics_2d/physics_2d_server_sw.h
+++ b/servers/physics_2d/physics_2d_server_sw.h
@@ -128,8 +128,8 @@ public:
 	virtual void area_remove_shape(RID p_area, int p_shape_idx);
 	virtual void area_clear_shapes(RID p_area);
 
-	virtual void area_attach_object_instance_ID(RID p_area, ObjectID p_ID);
-	virtual ObjectID area_get_object_instance_ID(RID p_area) const;
+	virtual void area_attach_object_instance_id(RID p_area, ObjectID p_ID);
+	virtual ObjectID area_get_object_instance_id(RID p_area) const;
 
 	virtual void area_set_param(RID p_area, AreaParameter p_param, const Variant &p_value);
 	virtual void area_set_transform(RID p_area, const Transform2D &p_transform);
@@ -172,8 +172,8 @@ public:
 	virtual void body_set_shape_disabled(RID p_body, int p_shape, bool p_disabled);
 	virtual void body_set_shape_as_one_way_collision(RID p_body, int p_shape, bool p_enabled);
 
-	virtual void body_attach_object_instance_ID(RID p_body, uint32_t p_ID);
-	virtual uint32_t body_get_object_instance_ID(RID p_body) const;
+	virtual void body_attach_object_instance_id(RID p_body, uint32_t p_ID);
+	virtual uint32_t body_get_object_instance_id(RID p_body) const;
 
 	virtual void body_set_continuous_collision_detection_mode(RID p_body, CCDMode p_mode);
 	virtual CCDMode body_get_continuous_collision_detection_mode(RID p_body) const;
diff --git a/servers/physics_2d/physics_2d_server_wrap_mt.cpp b/servers/physics_2d/physics_2d_server_wrap_mt.cpp
index d39231b1613..8d19153268d 100644
--- a/servers/physics_2d/physics_2d_server_wrap_mt.cpp
+++ b/servers/physics_2d/physics_2d_server_wrap_mt.cpp
@@ -51,7 +51,7 @@ void Physics2DServerWrapMT::_thread_callback(void *_instance) {
 
 void Physics2DServerWrapMT::thread_loop() {
 
-	server_thread = Thread::get_caller_ID();
+	server_thread = Thread::get_caller_id();
 
 	OS::get_singleton()->make_rendering_thread();
 
@@ -169,12 +169,12 @@ Physics2DServerWrapMT::Physics2DServerWrapMT(Physics2DServer *p_contained, bool
 	damped_spring_joint_pool_max_size = GLOBAL_GET("memory/limits/multithreaded_server/rid_pool_prealloc");
 
 	if (!p_create_thread) {
-		server_thread = Thread::get_caller_ID();
+		server_thread = Thread::get_caller_id();
 	} else {
 		server_thread = 0;
 	}
 
-	main_thread = Thread::get_caller_ID();
+	main_thread = Thread::get_caller_id();
 	first_frame = true;
 }
 
diff --git a/servers/physics_2d/physics_2d_server_wrap_mt.h b/servers/physics_2d/physics_2d_server_wrap_mt.h
index 8b6609d119a..8058709c063 100644
--- a/servers/physics_2d/physics_2d_server_wrap_mt.h
+++ b/servers/physics_2d/physics_2d_server_wrap_mt.h
@@ -98,7 +98,7 @@ public:
 	//these work well, but should be used from the main thread only
 	bool shape_collide(RID p_shape_A, const Transform2D &p_xform_A, const Vector2 &p_motion_A, RID p_shape_B, const Transform2D &p_xform_B, const Vector2 &p_motion_B, Vector2 *r_results, int p_result_max, int &r_result_count) {
 
-		ERR_FAIL_COND_V(main_thread != Thread::get_caller_ID(), false);
+		ERR_FAIL_COND_V(main_thread != Thread::get_caller_id(), false);
 		return physics_2d_server->shape_collide(p_shape_A, p_xform_A, p_motion_A, p_shape_B, p_xform_B, p_motion_B, r_results, p_result_max, r_result_count);
 	}
 
@@ -114,20 +114,20 @@ public:
 	// this function only works on fixed process, errors and returns null otherwise
 	Physics2DDirectSpaceState *space_get_direct_state(RID p_space) {
 
-		ERR_FAIL_COND_V(main_thread != Thread::get_caller_ID(), NULL);
+		ERR_FAIL_COND_V(main_thread != Thread::get_caller_id(), NULL);
 		return physics_2d_server->space_get_direct_state(p_space);
 	}
 
 	FUNC2(space_set_debug_contacts, RID, int);
 	virtual Vector<Vector2> space_get_contacts(RID p_space) const {
 
-		ERR_FAIL_COND_V(main_thread != Thread::get_caller_ID(), Vector<Vector2>());
+		ERR_FAIL_COND_V(main_thread != Thread::get_caller_id(), Vector<Vector2>());
 		return physics_2d_server->space_get_contacts(p_space);
 	}
 
 	virtual int space_get_contact_count(RID p_space) const {
 
-		ERR_FAIL_COND_V(main_thread != Thread::get_caller_ID(), 0);
+		ERR_FAIL_COND_V(main_thread != Thread::get_caller_id(), 0);
 		return physics_2d_server->space_get_contact_count(p_space);
 	}
 
@@ -153,8 +153,8 @@ public:
 	FUNC2(area_remove_shape, RID, int);
 	FUNC1(area_clear_shapes, RID);
 
-	FUNC2(area_attach_object_instance_ID, RID, ObjectID);
-	FUNC1RC(ObjectID, area_get_object_instance_ID, RID);
+	FUNC2(area_attach_object_instance_id, RID, ObjectID);
+	FUNC1RC(ObjectID, area_get_object_instance_id, RID);
 
 	FUNC3(area_set_param, RID, AreaParameter, const Variant &);
 	FUNC2(area_set_transform, RID, const Transform2D &);
@@ -198,8 +198,8 @@ public:
 	FUNC2(body_remove_shape, RID, int);
 	FUNC1(body_clear_shapes, RID);
 
-	FUNC2(body_attach_object_instance_ID, RID, uint32_t);
-	FUNC1RC(uint32_t, body_get_object_instance_ID, RID);
+	FUNC2(body_attach_object_instance_id, RID, uint32_t);
+	FUNC1RC(uint32_t, body_get_object_instance_id, RID);
 
 	FUNC2(body_set_continuous_collision_detection_mode, RID, CCDMode);
 	FUNC1RC(CCDMode, body_get_continuous_collision_detection_mode, RID);
@@ -249,7 +249,7 @@ public:
 
 	bool body_test_motion(RID p_body, const Transform2D &p_from, const Vector2 &p_motion, real_t p_margin = 0.001, MotionResult *r_result = NULL) {
 
-		ERR_FAIL_COND_V(main_thread != Thread::get_caller_ID(), false);
+		ERR_FAIL_COND_V(main_thread != Thread::get_caller_id(), false);
 		return physics_2d_server->body_test_motion(p_body, p_from, p_motion, p_margin, r_result);
 	}
 
diff --git a/servers/physics_2d_server.cpp b/servers/physics_2d_server.cpp
index fb7e89bd9ee..aa698f56d8d 100644
--- a/servers/physics_2d_server.cpp
+++ b/servers/physics_2d_server.cpp
@@ -514,8 +514,8 @@ void Physics2DServer::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("area_get_param", "area", "param"), &Physics2DServer::area_get_param);
 	ClassDB::bind_method(D_METHOD("area_get_transform", "area"), &Physics2DServer::area_get_transform);
 
-	ClassDB::bind_method(D_METHOD("area_attach_object_instance_ID", "area", "id"), &Physics2DServer::area_attach_object_instance_ID);
-	ClassDB::bind_method(D_METHOD("area_get_object_instance_ID", "area"), &Physics2DServer::area_get_object_instance_ID);
+	ClassDB::bind_method(D_METHOD("area_attach_object_instance_id", "area", "id"), &Physics2DServer::area_attach_object_instance_id);
+	ClassDB::bind_method(D_METHOD("area_get_object_instance_id", "area"), &Physics2DServer::area_get_object_instance_id);
 
 	ClassDB::bind_method(D_METHOD("area_set_monitor_callback", "area", "receiver", "method"), &Physics2DServer::area_set_monitor_callback);
 
@@ -543,8 +543,8 @@ void Physics2DServer::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("body_set_shape_disabled", "body", "shape_idx", "disable"), &Physics2DServer::body_set_shape_disabled);
 	ClassDB::bind_method(D_METHOD("body_set_shape_as_one_way_collision", "body", "shape_idx", "enable"), &Physics2DServer::body_set_shape_as_one_way_collision);
 
-	ClassDB::bind_method(D_METHOD("body_attach_object_instance_ID", "body", "id"), &Physics2DServer::body_attach_object_instance_ID);
-	ClassDB::bind_method(D_METHOD("body_get_object_instance_ID", "body"), &Physics2DServer::body_get_object_instance_ID);
+	ClassDB::bind_method(D_METHOD("body_attach_object_instance_id", "body", "id"), &Physics2DServer::body_attach_object_instance_id);
+	ClassDB::bind_method(D_METHOD("body_get_object_instance_id", "body"), &Physics2DServer::body_get_object_instance_id);
 
 	ClassDB::bind_method(D_METHOD("body_set_continuous_collision_detection_mode", "body", "mode"), &Physics2DServer::body_set_continuous_collision_detection_mode);
 	ClassDB::bind_method(D_METHOD("body_get_continuous_collision_detection_mode", "body"), &Physics2DServer::body_get_continuous_collision_detection_mode);
diff --git a/servers/physics_2d_server.h b/servers/physics_2d_server.h
index e3964247074..f3acd8df186 100644
--- a/servers/physics_2d_server.h
+++ b/servers/physics_2d_server.h
@@ -334,8 +334,8 @@ public:
 
 	virtual void area_set_shape_disabled(RID p_area, int p_shape, bool p_disabled) = 0;
 
-	virtual void area_attach_object_instance_ID(RID p_area, ObjectID p_ID) = 0;
-	virtual ObjectID area_get_object_instance_ID(RID p_area) const = 0;
+	virtual void area_attach_object_instance_id(RID p_area, ObjectID p_ID) = 0;
+	virtual ObjectID area_get_object_instance_id(RID p_area) const = 0;
 
 	virtual void area_set_param(RID p_area, AreaParameter p_param, const Variant &p_value) = 0;
 	virtual void area_set_transform(RID p_area, const Transform2D &p_transform) = 0;
@@ -388,8 +388,8 @@ public:
 	virtual void body_remove_shape(RID p_body, int p_shape_idx) = 0;
 	virtual void body_clear_shapes(RID p_body) = 0;
 
-	virtual void body_attach_object_instance_ID(RID p_body, uint32_t p_ID) = 0;
-	virtual uint32_t body_get_object_instance_ID(RID p_body) const = 0;
+	virtual void body_attach_object_instance_id(RID p_body, uint32_t p_ID) = 0;
+	virtual uint32_t body_get_object_instance_id(RID p_body) const = 0;
 
 	enum CCDMode {
 		CCD_MODE_DISABLED,
diff --git a/servers/physics_server.cpp b/servers/physics_server.cpp
index 6b6db1ff8c2..02f8e6e1afd 100644
--- a/servers/physics_server.cpp
+++ b/servers/physics_server.cpp
@@ -434,8 +434,8 @@ void PhysicsServer::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("area_get_param", "area", "param"), &PhysicsServer::area_get_param);
 	ClassDB::bind_method(D_METHOD("area_get_transform", "area"), &PhysicsServer::area_get_transform);
 
-	ClassDB::bind_method(D_METHOD("area_attach_object_instance_ID", "area", "id"), &PhysicsServer::area_attach_object_instance_ID);
-	ClassDB::bind_method(D_METHOD("area_get_object_instance_ID", "area"), &PhysicsServer::area_get_object_instance_ID);
+	ClassDB::bind_method(D_METHOD("area_attach_object_instance_id", "area", "id"), &PhysicsServer::area_attach_object_instance_id);
+	ClassDB::bind_method(D_METHOD("area_get_object_instance_id", "area"), &PhysicsServer::area_get_object_instance_id);
 
 	ClassDB::bind_method(D_METHOD("area_set_monitor_callback", "area", "receiver", "method"), &PhysicsServer::area_set_monitor_callback);
 
@@ -467,8 +467,8 @@ void PhysicsServer::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("body_remove_shape", "body", "shape_idx"), &PhysicsServer::body_remove_shape);
 	ClassDB::bind_method(D_METHOD("body_clear_shapes", "body"), &PhysicsServer::body_clear_shapes);
 
-	ClassDB::bind_method(D_METHOD("body_attach_object_instance_ID", "body", "id"), &PhysicsServer::body_attach_object_instance_ID);
-	ClassDB::bind_method(D_METHOD("body_get_object_instance_ID", "body"), &PhysicsServer::body_get_object_instance_ID);
+	ClassDB::bind_method(D_METHOD("body_attach_object_instance_id", "body", "id"), &PhysicsServer::body_attach_object_instance_id);
+	ClassDB::bind_method(D_METHOD("body_get_object_instance_id", "body"), &PhysicsServer::body_get_object_instance_id);
 
 	ClassDB::bind_method(D_METHOD("body_set_enable_continuous_collision_detection", "body", "enable"), &PhysicsServer::body_set_enable_continuous_collision_detection);
 	ClassDB::bind_method(D_METHOD("body_is_continuous_collision_detection_enabled", "body"), &PhysicsServer::body_is_continuous_collision_detection_enabled);
@@ -516,11 +516,11 @@ void PhysicsServer::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("pin_joint_set_param", "joint", "param", "value"), &PhysicsServer::pin_joint_set_param);
 	ClassDB::bind_method(D_METHOD("pin_joint_get_param", "joint", "param"), &PhysicsServer::pin_joint_get_param);
 
-	ClassDB::bind_method(D_METHOD("pin_joint_set_local_A", "joint", "local_A"), &PhysicsServer::pin_joint_set_local_A);
-	ClassDB::bind_method(D_METHOD("pin_joint_get_local_A", "joint"), &PhysicsServer::pin_joint_get_local_A);
+	ClassDB::bind_method(D_METHOD("pin_joint_set_local_a", "joint", "local_A"), &PhysicsServer::pin_joint_set_local_a);
+	ClassDB::bind_method(D_METHOD("pin_joint_get_local_a", "joint"), &PhysicsServer::pin_joint_get_local_a);
 
-	ClassDB::bind_method(D_METHOD("pin_joint_set_local_B", "joint", "local_B"), &PhysicsServer::pin_joint_set_local_B);
-	ClassDB::bind_method(D_METHOD("pin_joint_get_local_B", "joint"), &PhysicsServer::pin_joint_get_local_B);
+	ClassDB::bind_method(D_METHOD("pin_joint_set_local_b", "joint", "local_B"), &PhysicsServer::pin_joint_set_local_b);
+	ClassDB::bind_method(D_METHOD("pin_joint_get_local_b", "joint"), &PhysicsServer::pin_joint_get_local_b);
 
 	BIND_CONSTANT(PIN_JOINT_BIAS);
 	BIND_CONSTANT(PIN_JOINT_DAMPING);
diff --git a/servers/physics_server.h b/servers/physics_server.h
index 0f07fca6370..b38e14eb0c4 100644
--- a/servers/physics_server.h
+++ b/servers/physics_server.h
@@ -328,8 +328,8 @@ public:
 
 	virtual void area_set_shape_disabled(RID p_area, int p_shape_idx, bool p_disabled) = 0;
 
-	virtual void area_attach_object_instance_ID(RID p_area, ObjectID p_ID) = 0;
-	virtual ObjectID area_get_object_instance_ID(RID p_area) const = 0;
+	virtual void area_attach_object_instance_id(RID p_area, ObjectID p_ID) = 0;
+	virtual ObjectID area_get_object_instance_id(RID p_area) const = 0;
 
 	virtual void area_set_param(RID p_area, AreaParameter p_param, const Variant &p_value) = 0;
 	virtual void area_set_transform(RID p_area, const Transform &p_transform) = 0;
@@ -381,8 +381,8 @@ public:
 
 	virtual void body_set_shape_disabled(RID p_body, int p_shape_idx, bool p_disabled) = 0;
 
-	virtual void body_attach_object_instance_ID(RID p_body, uint32_t p_ID) = 0;
-	virtual uint32_t body_get_object_instance_ID(RID p_body) const = 0;
+	virtual void body_attach_object_instance_id(RID p_body, uint32_t p_ID) = 0;
+	virtual uint32_t body_get_object_instance_id(RID p_body) const = 0;
 
 	virtual void body_set_enable_continuous_collision_detection(RID p_body, bool p_enable) = 0;
 	virtual bool body_is_continuous_collision_detection_enabled(RID p_body) const = 0;
@@ -508,11 +508,11 @@ public:
 	virtual void pin_joint_set_param(RID p_joint, PinJointParam p_param, float p_value) = 0;
 	virtual float pin_joint_get_param(RID p_joint, PinJointParam p_param) const = 0;
 
-	virtual void pin_joint_set_local_A(RID p_joint, const Vector3 &p_A) = 0;
-	virtual Vector3 pin_joint_get_local_A(RID p_joint) const = 0;
+	virtual void pin_joint_set_local_a(RID p_joint, const Vector3 &p_A) = 0;
+	virtual Vector3 pin_joint_get_local_a(RID p_joint) const = 0;
 
-	virtual void pin_joint_set_local_B(RID p_joint, const Vector3 &p_B) = 0;
-	virtual Vector3 pin_joint_get_local_B(RID p_joint) const = 0;
+	virtual void pin_joint_set_local_b(RID p_joint, const Vector3 &p_B) = 0;
+	virtual Vector3 pin_joint_get_local_b(RID p_joint) const = 0;
 
 	enum HingeJointParam {
 
diff --git a/servers/server_wrap_mt_common.h b/servers/server_wrap_mt_common.h
index e285483e2bc..1ffa5ad14c1 100644
--- a/servers/server_wrap_mt_common.h
+++ b/servers/server_wrap_mt_common.h
@@ -30,7 +30,7 @@
 
 #define FUNC0R(m_r, m_type)                                                     \
 	virtual m_r m_type() {                                                      \
-		if (Thread::get_caller_ID() != server_thread) {                         \
+		if (Thread::get_caller_id() != server_thread) {                         \
 			m_r ret;                                                            \
 			command_queue.push_and_ret(server_name, &ServerName::m_type, &ret); \
 			SYNC_DEBUG                                                          \
@@ -55,7 +55,7 @@
 		}                                                                                  \
 	}                                                                                      \
 	virtual RID m_type##_create() {                                                        \
-		if (Thread::get_caller_ID() != server_thread) {                                    \
+		if (Thread::get_caller_id() != server_thread) {                                    \
 			RID rid;                                                                       \
 			alloc_mutex->lock();                                                           \
 			if (m_type##_id_pool.size() == 0) {                                            \
@@ -85,7 +85,7 @@
 		}                                                                                      \
 	}                                                                                          \
 	virtual RID m_type##_create(m_arg1 p1) {                                                   \
-		if (Thread::get_caller_ID() != server_thread) {                                        \
+		if (Thread::get_caller_id() != server_thread) {                                        \
 			RID rid;                                                                           \
 			alloc_mutex->lock();                                                               \
 			if (m_type##_id_pool.size() == 0) {                                                \
@@ -115,7 +115,7 @@
 		}                                                                                          \
 	}                                                                                              \
 	virtual RID m_type##_create(m_arg1 p1, m_arg2 p2) {                                            \
-		if (Thread::get_caller_ID() != server_thread) {                                            \
+		if (Thread::get_caller_id() != server_thread) {                                            \
 			RID rid;                                                                               \
 			alloc_mutex->lock();                                                                   \
 			if (m_type##_id_pool.size() == 0) {                                                    \
@@ -145,7 +145,7 @@
 		}                                                                                              \
 	}                                                                                                  \
 	virtual RID m_type##_create(m_arg1 p1, m_arg2 p2, m_arg3 p3) {                                     \
-		if (Thread::get_caller_ID() != server_thread) {                                                \
+		if (Thread::get_caller_id() != server_thread) {                                                \
 			RID rid;                                                                                   \
 			alloc_mutex->lock();                                                                       \
 			if (m_type##_id_pool.size() == 0) {                                                        \
@@ -175,7 +175,7 @@
 		}                                                                                                  \
 	}                                                                                                      \
 	virtual RID m_type##_create(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4) {                              \
-		if (Thread::get_caller_ID() != server_thread) {                                                    \
+		if (Thread::get_caller_id() != server_thread) {                                                    \
 			RID rid;                                                                                       \
 			alloc_mutex->lock();                                                                           \
 			if (m_type##_id_pool.size() == 0) {                                                            \
@@ -205,7 +205,7 @@
 		}                                                                                                      \
 	}                                                                                                          \
 	virtual RID m_type##_create(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5) {                       \
-		if (Thread::get_caller_ID() != server_thread) {                                                        \
+		if (Thread::get_caller_id() != server_thread) {                                                        \
 			RID rid;                                                                                           \
 			alloc_mutex->lock();                                                                               \
 			if (m_type##_id_pool.size() == 0) {                                                                \
@@ -223,7 +223,7 @@
 
 #define FUNC0RC(m_r, m_type)                                                    \
 	virtual m_r m_type() const {                                                \
-		if (Thread::get_caller_ID() != server_thread) {                         \
+		if (Thread::get_caller_id() != server_thread) {                         \
 			m_r ret;                                                            \
 			command_queue.push_and_ret(server_name, &ServerName::m_type, &ret); \
 			SYNC_DEBUG                                                          \
@@ -235,7 +235,7 @@
 
 #define FUNC0(m_type)                                             \
 	virtual void m_type() {                                       \
-		if (Thread::get_caller_ID() != server_thread) {           \
+		if (Thread::get_caller_id() != server_thread) {           \
 			command_queue.push(server_name, &ServerName::m_type); \
 		} else {                                                  \
 			server_name->m_type();                                \
@@ -244,7 +244,7 @@
 
 #define FUNC0C(m_type)                                            \
 	virtual void m_type() const {                                 \
-		if (Thread::get_caller_ID() != server_thread) {           \
+		if (Thread::get_caller_id() != server_thread) {           \
 			command_queue.push(server_name, &ServerName::m_type); \
 		} else {                                                  \
 			server_name->m_type();                                \
@@ -253,7 +253,7 @@
 
 #define FUNC0S(m_type)                                                     \
 	virtual void m_type() {                                                \
-		if (Thread::get_caller_ID() != server_thread) {                    \
+		if (Thread::get_caller_id() != server_thread) {                    \
 			command_queue.push_and_sync(server_name, &ServerName::m_type); \
 		} else {                                                           \
 			server_name->m_type();                                         \
@@ -262,7 +262,7 @@
 
 #define FUNC0SC(m_type)                                                    \
 	virtual void m_type() const {                                          \
-		if (Thread::get_caller_ID() != server_thread) {                    \
+		if (Thread::get_caller_id() != server_thread) {                    \
 			command_queue.push_and_sync(server_name, &ServerName::m_type); \
 		} else {                                                           \
 			server_name->m_type();                                         \
@@ -273,7 +273,7 @@
 
 #define FUNC1R(m_r, m_type, m_arg1)                                                 \
 	virtual m_r m_type(m_arg1 p1) {                                                 \
-		if (Thread::get_caller_ID() != server_thread) {                             \
+		if (Thread::get_caller_id() != server_thread) {                             \
 			m_r ret;                                                                \
 			command_queue.push_and_ret(server_name, &ServerName::m_type, p1, &ret); \
 			SYNC_DEBUG                                                              \
@@ -285,7 +285,7 @@
 
 #define FUNC1RC(m_r, m_type, m_arg1)                                                \
 	virtual m_r m_type(m_arg1 p1) const {                                           \
-		if (Thread::get_caller_ID() != server_thread) {                             \
+		if (Thread::get_caller_id() != server_thread) {                             \
 			m_r ret;                                                                \
 			command_queue.push_and_ret(server_name, &ServerName::m_type, p1, &ret); \
 			SYNC_DEBUG                                                              \
@@ -297,7 +297,7 @@
 
 #define FUNC1S(m_type, m_arg1)                                                 \
 	virtual void m_type(m_arg1 p1) {                                           \
-		if (Thread::get_caller_ID() != server_thread) {                        \
+		if (Thread::get_caller_id() != server_thread) {                        \
 			command_queue.push_and_sync(server_name, &ServerName::m_type, p1); \
 		} else {                                                               \
 			server_name->m_type(p1);                                           \
@@ -306,7 +306,7 @@
 
 #define FUNC1SC(m_type, m_arg1)                                                \
 	virtual void m_type(m_arg1 p1) const {                                     \
-		if (Thread::get_caller_ID() != server_thread) {                        \
+		if (Thread::get_caller_id() != server_thread) {                        \
 			command_queue.push_and_sync(server_name, &ServerName::m_type, p1); \
 		} else {                                                               \
 			server_name->m_type(p1);                                           \
@@ -315,7 +315,7 @@
 
 #define FUNC1(m_type, m_arg1)                                         \
 	virtual void m_type(m_arg1 p1) {                                  \
-		if (Thread::get_caller_ID() != server_thread) {               \
+		if (Thread::get_caller_id() != server_thread) {               \
 			command_queue.push(server_name, &ServerName::m_type, p1); \
 		} else {                                                      \
 			server_name->m_type(p1);                                  \
@@ -324,7 +324,7 @@
 
 #define FUNC1C(m_type, m_arg1)                                        \
 	virtual void m_type(m_arg1 p1) const {                            \
-		if (Thread::get_caller_ID() != server_thread) {               \
+		if (Thread::get_caller_id() != server_thread) {               \
 			command_queue.push(server_name, &ServerName::m_type, p1); \
 		} else {                                                      \
 			server_name->m_type(p1);                                  \
@@ -333,7 +333,7 @@
 
 #define FUNC2R(m_r, m_type, m_arg1, m_arg2)                                             \
 	virtual m_r m_type(m_arg1 p1, m_arg2 p2) {                                          \
-		if (Thread::get_caller_ID() != server_thread) {                                 \
+		if (Thread::get_caller_id() != server_thread) {                                 \
 			m_r ret;                                                                    \
 			command_queue.push_and_ret(server_name, &ServerName::m_type, p1, p2, &ret); \
 			SYNC_DEBUG                                                                  \
@@ -345,7 +345,7 @@
 
 #define FUNC2RC(m_r, m_type, m_arg1, m_arg2)                                            \
 	virtual m_r m_type(m_arg1 p1, m_arg2 p2) const {                                    \
-		if (Thread::get_caller_ID() != server_thread) {                                 \
+		if (Thread::get_caller_id() != server_thread) {                                 \
 			m_r ret;                                                                    \
 			command_queue.push_and_ret(server_name, &ServerName::m_type, p1, p2, &ret); \
 			SYNC_DEBUG                                                                  \
@@ -357,7 +357,7 @@
 
 #define FUNC2S(m_type, m_arg1, m_arg2)                                             \
 	virtual void m_type(m_arg1 p1, m_arg2 p2) {                                    \
-		if (Thread::get_caller_ID() != server_thread) {                            \
+		if (Thread::get_caller_id() != server_thread) {                            \
 			command_queue.push_and_sync(server_name, &ServerName::m_type, p1, p2); \
 		} else {                                                                   \
 			server_name->m_type(p1, p2);                                           \
@@ -366,7 +366,7 @@
 
 #define FUNC2SC(m_type, m_arg1, m_arg2)                                            \
 	virtual void m_type(m_arg1 p1, m_arg2 p2) const {                              \
-		if (Thread::get_caller_ID() != server_thread) {                            \
+		if (Thread::get_caller_id() != server_thread) {                            \
 			command_queue.push_and_sync(server_name, &ServerName::m_type, p1, p2); \
 		} else {                                                                   \
 			server_name->m_type(p1, p2);                                           \
@@ -375,7 +375,7 @@
 
 #define FUNC2(m_type, m_arg1, m_arg2)                                     \
 	virtual void m_type(m_arg1 p1, m_arg2 p2) {                           \
-		if (Thread::get_caller_ID() != server_thread) {                   \
+		if (Thread::get_caller_id() != server_thread) {                   \
 			command_queue.push(server_name, &ServerName::m_type, p1, p2); \
 		} else {                                                          \
 			server_name->m_type(p1, p2);                                  \
@@ -384,7 +384,7 @@
 
 #define FUNC2C(m_type, m_arg1, m_arg2)                                    \
 	virtual void m_type(m_arg1 p1, m_arg2 p2) const {                     \
-		if (Thread::get_caller_ID() != server_thread) {                   \
+		if (Thread::get_caller_id() != server_thread) {                   \
 			command_queue.push(server_name, &ServerName::m_type, p1, p2); \
 		} else {                                                          \
 			server_name->m_type(p1, p2);                                  \
@@ -393,7 +393,7 @@
 
 #define FUNC3R(m_r, m_type, m_arg1, m_arg2, m_arg3)                                         \
 	virtual m_r m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3) {                                   \
-		if (Thread::get_caller_ID() != server_thread) {                                     \
+		if (Thread::get_caller_id() != server_thread) {                                     \
 			m_r ret;                                                                        \
 			command_queue.push_and_ret(server_name, &ServerName::m_type, p1, p2, p3, &ret); \
 			SYNC_DEBUG                                                                      \
@@ -405,7 +405,7 @@
 
 #define FUNC3RC(m_r, m_type, m_arg1, m_arg2, m_arg3)                                        \
 	virtual m_r m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3) const {                             \
-		if (Thread::get_caller_ID() != server_thread) {                                     \
+		if (Thread::get_caller_id() != server_thread) {                                     \
 			m_r ret;                                                                        \
 			command_queue.push_and_ret(server_name, &ServerName::m_type, p1, p2, p3, &ret); \
 			return ret;                                                                     \
@@ -416,7 +416,7 @@
 
 #define FUNC3S(m_type, m_arg1, m_arg2, m_arg3)                                         \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3) {                             \
-		if (Thread::get_caller_ID() != server_thread) {                                \
+		if (Thread::get_caller_id() != server_thread) {                                \
 			command_queue.push_and_sync(server_name, &ServerName::m_type, p1, p2, p3); \
 		} else {                                                                       \
 			server_name->m_type(p1, p2, p3);                                           \
@@ -425,7 +425,7 @@
 
 #define FUNC3SC(m_type, m_arg1, m_arg2, m_arg3)                                        \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3) const {                       \
-		if (Thread::get_caller_ID() != server_thread) {                                \
+		if (Thread::get_caller_id() != server_thread) {                                \
 			command_queue.push_and_sync(server_name, &ServerName::m_type, p1, p2, p3); \
 		} else {                                                                       \
 			server_name->m_type(p1, p2, p3);                                           \
@@ -434,7 +434,7 @@
 
 #define FUNC3(m_type, m_arg1, m_arg2, m_arg3)                                 \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3) {                    \
-		if (Thread::get_caller_ID() != server_thread) {                       \
+		if (Thread::get_caller_id() != server_thread) {                       \
 			command_queue.push(server_name, &ServerName::m_type, p1, p2, p3); \
 		} else {                                                              \
 			server_name->m_type(p1, p2, p3);                                  \
@@ -443,7 +443,7 @@
 
 #define FUNC3C(m_type, m_arg1, m_arg2, m_arg3)                                \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3) const {              \
-		if (Thread::get_caller_ID() != server_thread) {                       \
+		if (Thread::get_caller_id() != server_thread) {                       \
 			command_queue.push(server_name, &ServerName::m_type, p1, p2, p3); \
 		} else {                                                              \
 			server_name->m_type(p1, p2, p3);                                  \
@@ -452,7 +452,7 @@
 
 #define FUNC4R(m_r, m_type, m_arg1, m_arg2, m_arg3, m_arg4)                                     \
 	virtual m_r m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4) {                            \
-		if (Thread::get_caller_ID() != server_thread) {                                         \
+		if (Thread::get_caller_id() != server_thread) {                                         \
 			m_r ret;                                                                            \
 			command_queue.push_and_ret(server_name, &ServerName::m_type, p1, p2, p3, p4, &ret); \
 			SYNC_DEBUG                                                                          \
@@ -464,7 +464,7 @@
 
 #define FUNC4RC(m_r, m_type, m_arg1, m_arg2, m_arg3, m_arg4)                                    \
 	virtual m_r m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4) const {                      \
-		if (Thread::get_caller_ID() != server_thread) {                                         \
+		if (Thread::get_caller_id() != server_thread) {                                         \
 			m_r ret;                                                                            \
 			command_queue.push_and_ret(server_name, &ServerName::m_type, p1, p2, p3, p4, &ret); \
 			SYNC_DEBUG                                                                          \
@@ -476,7 +476,7 @@
 
 #define FUNC4S(m_type, m_arg1, m_arg2, m_arg3, m_arg4)                                     \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4) {                      \
-		if (Thread::get_caller_ID() != server_thread) {                                    \
+		if (Thread::get_caller_id() != server_thread) {                                    \
 			command_queue.push_and_sync(server_name, &ServerName::m_type, p1, p2, p3, p4); \
 		} else {                                                                           \
 			server_name->m_type(p1, p2, p3, p4);                                           \
@@ -485,7 +485,7 @@
 
 #define FUNC4SC(m_type, m_arg1, m_arg2, m_arg3, m_arg4)                                    \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4) const {                \
-		if (Thread::get_caller_ID() != server_thread) {                                    \
+		if (Thread::get_caller_id() != server_thread) {                                    \
 			command_queue.push_and_sync(server_name, &ServerName::m_type, p1, p2, p3, p4); \
 		} else {                                                                           \
 			server_name->m_type(p1, p2, p3, p4);                                           \
@@ -494,7 +494,7 @@
 
 #define FUNC4(m_type, m_arg1, m_arg2, m_arg3, m_arg4)                             \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4) {             \
-		if (Thread::get_caller_ID() != server_thread) {                           \
+		if (Thread::get_caller_id() != server_thread) {                           \
 			command_queue.push(server_name, &ServerName::m_type, p1, p2, p3, p4); \
 		} else {                                                                  \
 			server_name->m_type(p1, p2, p3, p4);                                  \
@@ -503,7 +503,7 @@
 
 #define FUNC4C(m_type, m_arg1, m_arg2, m_arg3, m_arg4)                            \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4) const {       \
-		if (Thread::get_caller_ID() != server_thread) {                           \
+		if (Thread::get_caller_id() != server_thread) {                           \
 			command_queue.push(server_name, &ServerName::m_type, p1, p2, p3, p4); \
 		} else {                                                                  \
 			server_name->m_type(p1, p2, p3, p4);                                  \
@@ -512,7 +512,7 @@
 
 #define FUNC5R(m_r, m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5)                                 \
 	virtual m_r m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5) {                     \
-		if (Thread::get_caller_ID() != server_thread) {                                             \
+		if (Thread::get_caller_id() != server_thread) {                                             \
 			m_r ret;                                                                                \
 			command_queue.push_and_ret(server_name, &ServerName::m_type, p1, p2, p3, p4, p5, &ret); \
 			SYNC_DEBUG                                                                              \
@@ -524,7 +524,7 @@
 
 #define FUNC5RC(m_r, m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5)                                \
 	virtual m_r m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5) const {               \
-		if (Thread::get_caller_ID() != server_thread) {                                             \
+		if (Thread::get_caller_id() != server_thread) {                                             \
 			m_r ret;                                                                                \
 			command_queue.push_and_ret(server_name, &ServerName::m_type, p1, p2, p3, p4, p5, &ret); \
 			SYNC_DEBUG                                                                              \
@@ -536,7 +536,7 @@
 
 #define FUNC5S(m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5)                                 \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5) {               \
-		if (Thread::get_caller_ID() != server_thread) {                                        \
+		if (Thread::get_caller_id() != server_thread) {                                        \
 			command_queue.push_and_sync(server_name, &ServerName::m_type, p1, p2, p3, p4, p5); \
 		} else {                                                                               \
 			server_name->m_type(p1, p2, p3, p4, p5);                                           \
@@ -545,7 +545,7 @@
 
 #define FUNC5SC(m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5)                                \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5) const {         \
-		if (Thread::get_caller_ID() != server_thread) {                                        \
+		if (Thread::get_caller_id() != server_thread) {                                        \
 			command_queue.push_and_sync(server_name, &ServerName::m_type, p1, p2, p3, p4, p5); \
 		} else {                                                                               \
 			server_name->m_type(p1, p2, p3, p4, p5);                                           \
@@ -554,7 +554,7 @@
 
 #define FUNC5(m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5)                         \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5) {      \
-		if (Thread::get_caller_ID() != server_thread) {                               \
+		if (Thread::get_caller_id() != server_thread) {                               \
 			command_queue.push(server_name, &ServerName::m_type, p1, p2, p3, p4, p5); \
 		} else {                                                                      \
 			server_name->m_type(p1, p2, p3, p4, p5);                                  \
@@ -563,7 +563,7 @@
 
 #define FUNC5C(m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5)                         \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5) const { \
-		if (Thread::get_caller_ID() != server_thread) {                                \
+		if (Thread::get_caller_id() != server_thread) {                                \
 			command_queue.push(server_name, &ServerName::m_type, p1, p2, p3, p4, p5);  \
 		} else {                                                                       \
 			server_name->m_type(p1, p2, p3, p4, p5);                                   \
@@ -572,7 +572,7 @@
 
 #define FUNC6R(m_r, m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5, m_arg6)                             \
 	virtual m_r m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5, m_arg6 p6) {              \
-		if (Thread::get_caller_ID() != server_thread) {                                                 \
+		if (Thread::get_caller_id() != server_thread) {                                                 \
 			m_r ret;                                                                                    \
 			command_queue.push_and_ret(server_name, &ServerName::m_type, p1, p2, p3, p4, p5, p6, &ret); \
 			SYNC_DEBUG                                                                                  \
@@ -584,7 +584,7 @@
 
 #define FUNC6RC(m_r, m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5, m_arg6)                            \
 	virtual m_r m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5, m_arg6 p6) const {        \
-		if (Thread::get_caller_ID() != server_thread) {                                                 \
+		if (Thread::get_caller_id() != server_thread) {                                                 \
 			m_r ret;                                                                                    \
 			command_queue.push_and_ret(server_name, &ServerName::m_type, p1, p2, p3, p4, p5, p6, &ret); \
 			return ret;                                                                                 \
@@ -595,7 +595,7 @@
 
 #define FUNC6S(m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5, m_arg6)                             \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5, m_arg6 p6) {        \
-		if (Thread::get_caller_ID() != server_thread) {                                            \
+		if (Thread::get_caller_id() != server_thread) {                                            \
 			command_queue.push_and_sync(server_name, &ServerName::m_type, p1, p2, p3, p4, p5, p6); \
 		} else {                                                                                   \
 			server_name->m_type(p1, p2, p3, p4, p5, p6);                                           \
@@ -604,7 +604,7 @@
 
 #define FUNC6SC(m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5, m_arg6)                            \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5, m_arg6 p6) const {  \
-		if (Thread::get_caller_ID() != server_thread) {                                            \
+		if (Thread::get_caller_id() != server_thread) {                                            \
 			command_queue.push_and_sync(server_name, &ServerName::m_type, p1, p2, p3, p4, p5, p6); \
 		} else {                                                                                   \
 			server_name->m_type(p1, p2, p3, p4, p5, p6);                                           \
@@ -613,7 +613,7 @@
 
 #define FUNC6(m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5, m_arg6)                       \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5, m_arg6 p6) { \
-		if (Thread::get_caller_ID() != server_thread) {                                     \
+		if (Thread::get_caller_id() != server_thread) {                                     \
 			command_queue.push(server_name, &ServerName::m_type, p1, p2, p3, p4, p5, p6);   \
 		} else {                                                                            \
 			server_name->m_type(p1, p2, p3, p4, p5, p6);                                    \
@@ -622,7 +622,7 @@
 
 #define FUNC6C(m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5, m_arg6)                            \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5, m_arg6 p6) const { \
-		if (Thread::get_caller_ID() != server_thread) {                                           \
+		if (Thread::get_caller_id() != server_thread) {                                           \
 			command_queue.push(server_name, &ServerName::m_type, p1, p2, p3, p4, p5, p6);         \
 		} else {                                                                                  \
 			server_name->m_type(p1, p2, p3, p4, p5, p6);                                          \
@@ -631,7 +631,7 @@
 
 #define FUNC7R(m_r, m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5, m_arg6, m_arg7)                         \
 	virtual m_r m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5, m_arg6 p6, m_arg7 p7) {       \
-		if (Thread::get_caller_ID() != server_thread) {                                                     \
+		if (Thread::get_caller_id() != server_thread) {                                                     \
 			m_r ret;                                                                                        \
 			command_queue.push_and_ret(server_name, &ServerName::m_type, p1, p2, p3, p4, p5, p6, p7, &ret); \
 			SYNC_DEBUG                                                                                      \
@@ -643,7 +643,7 @@
 
 #define FUNC7RC(m_r, m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5, m_arg6, m_arg7)                        \
 	virtual m_r m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5, m_arg6 p6, m_arg7 p7) const { \
-		if (Thread::get_caller_ID() != server_thread) {                                                     \
+		if (Thread::get_caller_id() != server_thread) {                                                     \
 			m_r ret;                                                                                        \
 			command_queue.push_and_ret(server_name, &ServerName::m_type, p1, p2, p3, p4, p5, p6, p7, &ret); \
 			SYNC_DEBUG                                                                                      \
@@ -655,7 +655,7 @@
 
 #define FUNC7S(m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5, m_arg6, m_arg7)                         \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5, m_arg6 p6, m_arg7 p7) { \
-		if (Thread::get_caller_ID() != server_thread) {                                                \
+		if (Thread::get_caller_id() != server_thread) {                                                \
 			command_queue.push_and_sync(server_name, &ServerName::m_type, p1, p2, p3, p4, p5, p6, p7); \
 		} else {                                                                                       \
 			server_name->m_type(p1, p2, p3, p4, p5, p6, p7);                                           \
@@ -664,7 +664,7 @@
 
 #define FUNC7SC(m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5, m_arg6, m_arg7)                              \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5, m_arg6 p6, m_arg7 p7) const { \
-		if (Thread::get_caller_ID() != server_thread) {                                                      \
+		if (Thread::get_caller_id() != server_thread) {                                                      \
 			command_queue.push_and_sync(server_name, &ServerName::m_type, p1, p2, p3, p4, p5, p6, p7);       \
 		} else {                                                                                             \
 			server_name->m_type(p1, p2, p3, p4, p5, p6, p7);                                                 \
@@ -673,7 +673,7 @@
 
 #define FUNC7(m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5, m_arg6, m_arg7)                          \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5, m_arg6 p6, m_arg7 p7) { \
-		if (Thread::get_caller_ID() != server_thread) {                                                \
+		if (Thread::get_caller_id() != server_thread) {                                                \
 			command_queue.push(server_name, &ServerName::m_type, p1, p2, p3, p4, p5, p6, p7);          \
 		} else {                                                                                       \
 			server_name->m_type(p1, p2, p3, p4, p5, p6, p7);                                           \
@@ -682,7 +682,7 @@
 
 #define FUNC7C(m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5, m_arg6, m_arg7)                               \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5, m_arg6 p6, m_arg7 p7) const { \
-		if (Thread::get_caller_ID() != server_thread) {                                                      \
+		if (Thread::get_caller_id() != server_thread) {                                                      \
 			command_queue.push(server_name, &ServerName::m_type, p1, p2, p3, p4, p5, p6, p7);                \
 		} else {                                                                                             \
 			server_name->m_type(p1, p2, p3, p4, p5, p6, p7);                                                 \
@@ -691,7 +691,7 @@
 
 #define FUNC8R(m_r, m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5, m_arg6, m_arg7, m_arg8)                      \
 	virtual m_r m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5, m_arg6 p6, m_arg7 p7, m_arg8 p8) { \
-		if (Thread::get_caller_ID() != server_thread) {                                                          \
+		if (Thread::get_caller_id() != server_thread) {                                                          \
 			m_r ret;                                                                                             \
 			command_queue.push_and_ret(server_name, &ServerName::m_type, p1, p2, p3, p4, p5, p6, p7, p8, &ret);  \
 			SYNC_DEBUG                                                                                           \
@@ -703,7 +703,7 @@
 
 #define FUNC8RC(m_r, m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5, m_arg6, m_arg7, m_arg8)                           \
 	virtual m_r m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5, m_arg6 p6, m_arg7 p7, m_arg8 p8) const { \
-		if (Thread::get_caller_ID() != server_thread) {                                                                \
+		if (Thread::get_caller_id() != server_thread) {                                                                \
 			m_r ret;                                                                                                   \
 			command_queue.push_and_ret(server_name, &ServerName::m_type, p1, p2, p3, p4, p5, p6, p7, p8, &ret);        \
 			SYNC_DEBUG                                                                                                 \
@@ -715,7 +715,7 @@
 
 #define FUNC8S(m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5, m_arg6, m_arg7, m_arg8)                            \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5, m_arg6 p6, m_arg7 p7, m_arg8 p8) { \
-		if (Thread::get_caller_ID() != server_thread) {                                                           \
+		if (Thread::get_caller_id() != server_thread) {                                                           \
 			command_queue.push_and_sync(server_name, &ServerName::m_type, p1, p2, p3, p4, p5, p6, p7, p8);        \
 		} else {                                                                                                  \
 			server_name->m_type(p1, p2, p3, p4, p5, p6, p7, p8);                                                  \
@@ -724,7 +724,7 @@
 
 #define FUNC8SC(m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5, m_arg6, m_arg7, m_arg8)                                 \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5, m_arg6 p6, m_arg7 p7, m_arg8 p8) const { \
-		if (Thread::get_caller_ID() != server_thread) {                                                                 \
+		if (Thread::get_caller_id() != server_thread) {                                                                 \
 			command_queue.push_and_sync(server_name, &ServerName::m_type, p1, p2, p3, p4, p5, p6, p7, p8);              \
 		} else {                                                                                                        \
 			server_name->m_type(p1, p2, p3, p4, p5, p6, p7, p8);                                                        \
@@ -733,7 +733,7 @@
 
 #define FUNC8(m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5, m_arg6, m_arg7, m_arg8)                             \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5, m_arg6 p6, m_arg7 p7, m_arg8 p8) { \
-		if (Thread::get_caller_ID() != server_thread) {                                                           \
+		if (Thread::get_caller_id() != server_thread) {                                                           \
 			command_queue.push(server_name, &ServerName::m_type, p1, p2, p3, p4, p5, p6, p7, p8);                 \
 		} else {                                                                                                  \
 			server_name->m_type(p1, p2, p3, p4, p5, p6, p7, p8);                                                  \
@@ -742,7 +742,7 @@
 
 #define FUNC8C(m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5, m_arg6, m_arg7, m_arg8)                                  \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5, m_arg6 p6, m_arg7 p7, m_arg8 p8) const { \
-		if (Thread::get_caller_ID() != server_thread) {                                                                 \
+		if (Thread::get_caller_id() != server_thread) {                                                                 \
 			command_queue.push(server_name, &ServerName::m_type, p1, p2, p3, p4, p5, p6, p7, p8);                       \
 		} else {                                                                                                        \
 			server_name->m_type(p1, p2, p3, p4, p5, p6, p7, p8);                                                        \
@@ -751,7 +751,7 @@
 
 #define FUNC9(m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5, m_arg6, m_arg7, m_arg8, m_arg9)                                \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5, m_arg6 p6, m_arg7 p7, m_arg8 p8, m_arg9 p9) { \
-		if (Thread::get_caller_ID() != server_thread) {                                                                      \
+		if (Thread::get_caller_id() != server_thread) {                                                                      \
 			command_queue.push(server_name, &ServerName::m_type, p1, p2, p3, p4, p5, p6, p7, p8, p9);                        \
 		} else {                                                                                                             \
 			server_name->m_type(p1, p2, p3, p4, p5, p6, p7, p8, p9);                                                         \
@@ -760,7 +760,7 @@
 
 #define FUNC10(m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5, m_arg6, m_arg7, m_arg8, m_arg9, m_arg10)                                   \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5, m_arg6 p6, m_arg7 p7, m_arg8 p8, m_arg9 p9, m_arg10 p10) { \
-		if (Thread::get_caller_ID() != server_thread) {                                                                                   \
+		if (Thread::get_caller_id() != server_thread) {                                                                                   \
 			command_queue.push(server_name, &ServerName::m_type, p1, p2, p3, p4, p5, p6, p7, p8, p9, p10);                                \
 		} else {                                                                                                                          \
 			server_name->m_type(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10);                                                                 \
@@ -769,7 +769,7 @@
 
 #define FUNC11(m_type, m_arg1, m_arg2, m_arg3, m_arg4, m_arg5, m_arg6, m_arg7, m_arg8, m_arg9, m_arg10, m_arg11)                                       \
 	virtual void m_type(m_arg1 p1, m_arg2 p2, m_arg3 p3, m_arg4 p4, m_arg5 p5, m_arg6 p6, m_arg7 p7, m_arg8 p8, m_arg9 p9, m_arg10 p10, m_arg11 p11) { \
-		if (Thread::get_caller_ID() != server_thread) {                                                                                                \
+		if (Thread::get_caller_id() != server_thread) {                                                                                                \
 			command_queue.push(server_name, &ServerName::m_type, p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11);                                        \
 		} else {                                                                                                                                       \
 			server_name->m_type(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11);                                                                         \
diff --git a/servers/visual/visual_server_raster.cpp b/servers/visual/visual_server_raster.cpp
index f17411f11a9..b5f98dd94c8 100644
--- a/servers/visual/visual_server_raster.cpp
+++ b/servers/visual/visual_server_raster.cpp
@@ -78,7 +78,7 @@ void VisualServerRaster::request_frame_drawn_callback(Object *p_where, const Str
 
 	ERR_FAIL_NULL(p_where);
 	FrameDrawnCallbacks fdc;
-	fdc.object = p_where->get_instance_ID();
+	fdc.object = p_where->get_instance_id();
 	fdc.method = p_method;
 	fdc.param = p_userdata;
 
@@ -2626,14 +2626,14 @@ AABB VisualServerRaster::instance_get_base_aabb(RID p_instance) const {
 
 }
 
-void VisualServerRaster::instance_attach_object_instance_ID(RID p_instance,uint32_t p_ID) {
+void VisualServerRaster::instance_attach_object_instance_id(RID p_instance,uint32_t p_ID) {
 	VS_CHANGED;
 	Instance *instance = instance_owner.get( p_instance );
 	ERR_FAIL_COND( !instance );
 
 	instance->object_ID=p_ID;
 }
-uint32_t VisualServerRaster::instance_get_object_instance_ID(RID p_instance) const {
+uint32_t VisualServerRaster::instance_get_object_instance_id(RID p_instance) const {
 
 	Instance *instance = instance_owner.get( p_instance );
 	ERR_FAIL_COND_V( !instance, 0 );
diff --git a/servers/visual/visual_server_raster.h b/servers/visual/visual_server_raster.h
index b13bb904abe..56e4323f7cd 100644
--- a/servers/visual/visual_server_raster.h
+++ b/servers/visual/visual_server_raster.h
@@ -998,7 +998,7 @@ public:
 	BIND2(instance_set_scenario, RID, RID) // from can be mesh, light, poly, area and portal so far.
 	BIND2(instance_set_layer_mask, RID, uint32_t)
 	BIND2(instance_set_transform, RID, const Transform &)
-	BIND2(instance_attach_object_instance_ID, RID, ObjectID)
+	BIND2(instance_attach_object_instance_id, RID, ObjectID)
 	BIND3(instance_set_blend_shape_weight, RID, int, float)
 	BIND3(instance_set_surface_material, RID, int, RID)
 	BIND2(instance_set_visible, RID, bool)
diff --git a/servers/visual/visual_server_scene.cpp b/servers/visual/visual_server_scene.cpp
index 87431a2ce4b..56a596de556 100644
--- a/servers/visual/visual_server_scene.cpp
+++ b/servers/visual/visual_server_scene.cpp
@@ -797,7 +797,7 @@ void VisualServerScene::instance_set_transform(RID p_instance, const Transform &
 	instance->transform = p_transform;
 	_instance_queue_update(instance, true);
 }
-void VisualServerScene::instance_attach_object_instance_ID(RID p_instance, ObjectID p_ID) {
+void VisualServerScene::instance_attach_object_instance_id(RID p_instance, ObjectID p_ID) {
 
 	Instance *instance = instance_owner.get(p_instance);
 	ERR_FAIL_COND(!instance);
diff --git a/servers/visual/visual_server_scene.h b/servers/visual/visual_server_scene.h
index 17b95946b34..a4895382a48 100644
--- a/servers/visual/visual_server_scene.h
+++ b/servers/visual/visual_server_scene.h
@@ -489,7 +489,7 @@ public:
 	virtual void instance_set_scenario(RID p_instance, RID p_scenario); // from can be mesh, light, poly, area and portal so far.
 	virtual void instance_set_layer_mask(RID p_instance, uint32_t p_mask);
 	virtual void instance_set_transform(RID p_instance, const Transform &p_transform);
-	virtual void instance_attach_object_instance_ID(RID p_instance, ObjectID p_ID);
+	virtual void instance_attach_object_instance_id(RID p_instance, ObjectID p_ID);
 	virtual void instance_set_blend_shape_weight(RID p_instance, int p_shape, float p_weight);
 	virtual void instance_set_surface_material(RID p_instance, int p_surface, RID p_material);
 	virtual void instance_set_visible(RID p_instance, bool p_visible);
diff --git a/servers/visual/visual_server_wrap_mt.cpp b/servers/visual/visual_server_wrap_mt.cpp
index 525e3dc2f97..827f47a16ef 100644
--- a/servers/visual/visual_server_wrap_mt.cpp
+++ b/servers/visual/visual_server_wrap_mt.cpp
@@ -68,7 +68,7 @@ void VisualServerWrapMT::_thread_callback(void *_instance) {
 
 void VisualServerWrapMT::thread_loop() {
 
-	server_thread = Thread::get_caller_ID();
+	server_thread = Thread::get_caller_id();
 
 	OS::get_singleton()->make_rendering_thread();
 
@@ -179,7 +179,7 @@ VisualServerWrapMT::VisualServerWrapMT(VisualServer *p_contained, bool p_create_
 	pool_max_size = GLOBAL_GET("memory/limits/multithreaded_server/rid_pool_prealloc");
 
 	if (!p_create_thread) {
-		server_thread = Thread::get_caller_ID();
+		server_thread = Thread::get_caller_id();
 	} else {
 		server_thread = 0;
 	}
diff --git a/servers/visual/visual_server_wrap_mt.h b/servers/visual/visual_server_wrap_mt.h
index e6ce3f6a54e..6c98082b980 100644
--- a/servers/visual/visual_server_wrap_mt.h
+++ b/servers/visual/visual_server_wrap_mt.h
@@ -430,7 +430,7 @@ public:
 	FUNC2(instance_set_scenario, RID, RID) // from can be mesh, light, poly, area and portal so far.
 	FUNC2(instance_set_layer_mask, RID, uint32_t)
 	FUNC2(instance_set_transform, RID, const Transform &)
-	FUNC2(instance_attach_object_instance_ID, RID, ObjectID)
+	FUNC2(instance_attach_object_instance_id, RID, ObjectID)
 	FUNC3(instance_set_blend_shape_weight, RID, int, float)
 	FUNC3(instance_set_surface_material, RID, int, RID)
 	FUNC2(instance_set_visible, RID, bool)
diff --git a/servers/visual_server.h b/servers/visual_server.h
index 5c9f4202f9e..e017bd10fcd 100644
--- a/servers/visual_server.h
+++ b/servers/visual_server.h
@@ -727,7 +727,7 @@ public:
 	virtual void instance_set_scenario(RID p_instance, RID p_scenario) = 0; // from can be mesh, light, poly, area and portal so far.
 	virtual void instance_set_layer_mask(RID p_instance, uint32_t p_mask) = 0;
 	virtual void instance_set_transform(RID p_instance, const Transform &p_transform) = 0;
-	virtual void instance_attach_object_instance_ID(RID p_instance, ObjectID p_ID) = 0;
+	virtual void instance_attach_object_instance_id(RID p_instance, ObjectID p_ID) = 0;
 	virtual void instance_set_blend_shape_weight(RID p_instance, int p_shape, float p_weight) = 0;
 	virtual void instance_set_surface_material(RID p_instance, int p_surface, RID p_material) = 0;
 	virtual void instance_set_visible(RID p_instance, bool p_visible) = 0;